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Foreword

Getting started

• Hair Room — the hair room. Curves, walls, cocoons and crowns: the hairstyle is built on the head and turned into geometry.
• Topology Room — the topology room. Retopology over a high-poly model, vertex normals, mesh cleanup and UVs.

• 📂 Open… — open a .hairmesh project file from disk.
• Recent projects — recent projects with a picture and date. Clicking a card opens the project; the cross in its corner removes the project from the list, while the file itself stays on disk. If the file was moved or deleted, the card says "Not found". Hide all clears the list, Hide missing removes only the missing files from it.
• Examples — finished hairstyles made in the program. They are handy for learning how a hairstyle is built: curves, walls, crown, guides, conversion settings. An example opens as a copy: when saving, the program asks where to save your version.
• Autosaves — the five newest autosaves. Opening a copy does not change it; to keep changes, save the project. ⏱ Autosave settings… turns autosave on and off and sets the interval, number of copies and folder.
• Migrate — move hair from another project into the current one. 📂 Choose file… picks the project; its curves, NURBS surfaces and modifiers appear in the current one as a separate group named after the file. Lower on the tab are recent projects for quick selection, and you can also just drag a file onto the window. Here too, in the Presets section, are presets: hair from the examples and your own. ＋ Create preset saves the group selected in the scene as a preset.

Hair room: interface

• File — the start window with recent projects, autosaves, migration and presets (Ctrl+O).
• Save — save the project (Ctrl+S; Ctrl+Shift+S — save as).
• Autosave — autosave settings: interval, number of copies, folder.
• Reload — restart the program and open the same project. Unsaved changes are not lost.
• Export — export meshes (selected or all) to OBJ, FBX, glTF, PLY or STL. The export window sets the path, format, scale and normal type.
• Bridge ▾ — send meshes straight to another program: directly to Blender or Maya, or to a folder watched by another program (Unreal, Unity, Godot, ZBrush).
• Display ▾ — what to show in the viewport: X-ray, visibility and opacity of anchors, curves, guides, the mesh, NURBS surfaces and the wireframe.
• ● Rec — session recording (see the foreword).

• + — import a reference head or a mesh (OBJ, GLB, GLTF, FBX) and simple primitives; the W button shows the wireframe of the head and imported meshes; Aa — smart rename (Shift+F2).
• Gizmo: World / Local — gizmo axes in world or local coordinates (W); X, Y, Z — enable or lock an axis.
• Camera ▾ — camera reset, perspective or orthographic, views, split screen.
• Reference ▾ — a reference board (like PureRef) and image planes in the viewport.
• Solo — show only the group you are working with. Select something in another group and Solo switches to it.
• Lock select — clicking a curve, wall or modifier selects the whole lock: all curves joined by walls. With Shift — add or remove a lock.
• Floor — the floor grid: the first slider moves the floor up or down, the second sets opacity (0 — floor off). ⊙ 0 puts the floor at the origin if a mesh was imported far from the scene centre.
• Axes — opacity of the world axes (X red, Y green, Z blue); 0 — axes off.

• A — the group's curve display mode: hide automatically, always show, or never show;
• coloured square — the group's colour; lock surfaces are painted with it;
• symmetry indicator — a click turns the group's mirror copy on and off (axis and Apply are in the group settings, see "Snapping and symmetry");
• free curves icon — curves not tied to a wall or a modifier stay visible in the viewport even when the group is not selected (on by default);
• eye — visibility of the whole group.

Inspector

• Connection check — finds the places where locks of the selected cocoons are welded and opens the inspector report: a list of places and an auto-fix button (Auto-fix). The Stitch radius slider sets how close the points of two locks must be for them to be stitched. The value is in loop steps, 0.1 by default: the smaller it is, the fewer places get into the report.
• Near anchors — highlights in orange anchors of different curves that sit practically at one point but are not welded.
• Degenerate curves — highlights broken curves. In red — curves with fewer than two anchors or zero length; if anchors sit almost on top of each other, the curve becomes thin red and the spot itself is marked with a big yellow marker.
• Twisted — highlights twisted walls in lime: where a wall turns around its length more than the set angle within one loop step, you will get non-planar polygons. The angle is set by the Twist, ° slider.

• Frame counter — FPS and frame time.
• Model stats — in the Hair room they show how many polygons, triangles and vertices you will get if you convert the selected cocoons. A click switches the view: column → row → off.
• History — a history slider along the bottom edge of the viewport. Each step is labelled, a click returns to it, the right button deletes a step (later ones remain).
• Keystroke display — a window over the program with pressed keys, combinations and mouse buttons (repeats — ×N). Handy for recording tutorials.

Hair room: first steps

• Import polygroups — keep the file's polygroups (OBJ groups and objects, glTF and FBX meshes). Off — one mesh, one polygroup. Split polygroups into separate meshes — each polygroup becomes a separate mesh in a group named after the file.
• Import as head — this model is the head the hair is built on. If there is already a head, the model is added to it.
• Import UVs, Import textures — the file's UV layout and textures; without UVs the textures will not apply.
• Import polypaint — colours painted on vertices (ZBrush polypaint, vertex colours).
• Import creases, Import hard edges — subdivision creases and hard edges from the file.
• Import curves — curves from the file (OBJ lines, FBX curves) become program curves.

• Show mask — show the mask in green while the mesh is selected or snapping is on.
• Mirror +X → −X, Mirror −X → +X — mirror the mask from one side to the other.
• Clear mask — clear the mask.
• + Selected polygroups, − Selected polygroups — add the picked polygroups to the mask or remove them; − Hidden parts — remove hidden parts from the mask.
• Mask brush — paint the mask with a brush (Brush: the left button adds, Ctrl erases, [ and ] — size) or a lasso (Lasso). With Shift the brush also draws a lasso.
• Paint through — the brush also paints what the camera cannot see: the back side and layers under others.
• Leave out the covered parts — skip polygons in front of which lies another layer of the same mesh; Cover distance — how far to look for such a layer.

• first row: model wireframe display; textures (double click or RMB — texture manager); a custom material instead of grey (double click or RMB — its settings);
• second row: smooth shading; flat per-polygon shading; silhouette — one colour without lighting;
• third row: polygroups, each in its own colour; UV checker; UV stretch map (red is compressed, blue is stretched).

Moving, visibility and editing

• H (short press) — hide the selection or show it again;
• Ctrl+H — isolate the selection: only it is shown (again — everything back);
• Shift+H — isolate the selection together with the head;
• Ctrl+Shift+H — keep only the working group;
• the H menu also has Unhide all — show everything hidden.

• D — duplicate, Delete — delete;
• Alt+G — gather the selection into a new group in its place;
• P — parent the selection to the last selected, Shift+P — take out of the hierarchy;
• F2 — rename, Shift+F2 — smart rename: numbering in names, prefixes, find and replace, sorting;
• Ctrl+C (⧉ SEL) — copy the selection: the list of what is selected and the camera to the clipboard (to paste into a message), and curves as a path for ⇶ Snap to path;
• Ctrl+Z — undo, Ctrl+Shift+Z or Ctrl+Y — redo.

Snapping and symmetry

• Type: Planar — mirroring through the plane of each checked axis; Topology — twins are found by position and then tracked along mesh edges (holds even on a slightly asymmetrical model); Radial — copies around the first checked axis, their number is set by Copies;
• axes X, Y, Z — which planes to mirror through (several — each and their combinations);
• Space: Local — the object's axes and centre, Global — world, Workplane — the gizmo's work plane (Alt + drag), Custom — a set point and world axes;
• Context — where the plane lies: Auto — at the origin if the object is symmetrical about it, otherwise through its middle; Origin — always at the origin; Box — through the middle of the bounds;
• Restrict — a point on the plane stays on it while moving, so the middle does not drift apart;
• Tolerance — how far a twin may be from the mirror point;
• Show Planes — show the planes while symmetry is on.

Groups, curves and walls

• Curve — a regular curve. The left button places points: on the head or on a plane that passes through the last point and faces you. Esc or Enter finishes the curve.
• Lock — a flat lock. The curve becomes its centre line, and the circle at the cursor sets the width at each point; width is changed with Ctrl+wheel or Ctrl+RMB drag. If before drawing you select (Cursor, Shift + click) two anchors of other curves, the lock starts between them with a width equal to the distance between them. If you select three or more anchors — across a volume lock — a volume branch starts through all those anchors, and their ring becomes its cross-section.
• Edges (V) — curves from the edges of a mesh, imported or converted. Details below.

• click — an edge, double click — an edge loop up to the nearest fork;
• Shift — add, Ctrl — remove (double click — a loop, drag — a box);
• Ctrl+Shift — shortest path from the last picked edge;
• Esc — clear the selection.

• Max curves around — if there are this many edge lines around a lock or fewer, a curve goes on each; if more — only on the folds;
• Crease angle — from what bend angle a line counts as a fold, that is, a lock edge;
• Smooth lock: curves — how many curves a round lock without folds or a non-quad mesh gets;
• Root: top end — root at the top end, for hanging hair; Root: nearest the head — root at the end nearest the head, for sticking-out locks.

• Profile smoothing — evens out width and rotation along the lock: 0 — exactly as set on the anchors, more — smoother transitions between them;
• Tip — over what fraction of the length the lock narrows to a point at the tip (0 — a cut end);
• Plain curve — remove the flat lock and keep just the curve.

• ⬆ Extrude — extrudes the ribbon into volume: LMB — paint, Ctrl — erase, Shift — smooth. Depth — how far a weight of 100% extrudes (in lock half-widths), Fade to tip — over what fraction of the length near the tip extrusion fades out, ⇅ Invert extrude — extrude to the other side. Start with Extrude: the other brushes work on what has been extruded;
• ↔ Offset — moves the extruded edge nearest to the brush: LMB — inward (orange; at 100% — up to the other edge), Ctrl — outward (blue; by one more width), Ctrl+Alt — erase, Shift — smooth. The edges move independently;
• ⋎ Glue faces — closes the top face of the extrusion (green): at 100% its two edges meet into one, and the cross-section becomes the letter Y.

• Roundness — 0: a smooth spline, 1: each bend follows a circular arc through the anchors;
• Smoothing — adjusts anchor handles so that curvature changes without jumps;
• Even out anchors — moves the anchors themselves and removes waviness while keeping the overall shape.

• ✖ Delete anchor — delete the anchor; ✖ Delete anchor, keep shape — delete it while keeping the curve's shape;
• ↺ Recalculate handles — recalculate the anchor's handles;
• ∿ Create curve through the anchors — a new curve through the selected anchors in selection order; ∿ Create curve between the anchors — a curve between two selected anchors, raised above the head;
• ⚙ Optimize the selected anchors — remove extra anchors among the selected ones while keeping the shape;
• ⤾ Rotate junction — at a fork, choose which curves pass through it smoothly, or return to automatic tangents;
• ✂ Separate the zones at this X — where curves cross in an X or welded strands swap in pairs, walls are cut across: above and below become separate zones, while the curves stay whole;
• ⫘ Zip the curves, ⇶ Snap to path, ⇶ Unglue from the curve — covered in "Welding, zipping and snapping curves"; ⛓ Detach from the connector — detach from the crown's lower line.

• ◎ Select all curves of the lock — select all curves of the lock joined by walls;
• ⌖ Select — paths through the forks — a list of paths from root to tip through forks: a click adds a path to the selection (an already selected one is removed), ⊙ Every curve of these paths selects everything;
• ⤳ Change the route — for a service curve, choose another path through forks: the part that went along the wrong branch is replaced, and the walls follow (for a wall — separately for each of its sides);
• ✂ Separate the trunk — on a shared trunk, choose a branch that gets its own trunk;
• ✂ Split … into N walls — split a wall into its component parts.

• ▦ Wall between exactly these two curves / Walls between exactly these N curves — walls exactly between the selected curves, without searching for neighbours; ▦ Walls between N curves (open) — an open row of walls;
• ◈ Volume lock from N curves (closed) — a closed volume lock: walls go in a ring through all selected curves;
• ▦ Walls along the selected paths — walls along the selected paths through forks; ▦ Wall between the two trunks — a wall between two trunks whose branches face each other;
• ◭ Fill the hole between these curves — close the hole between the selected curves;
• ◎ Detect the fill outline here — the program itself finds the outline of the area under the cursor (a hole in the walls or a patch between the nearest curves) and, after confirmation, covers it with a wall. Handy on complex lock forks;
• ∿ Create average curve — a curve midway between two selected ones;
• ⛓ Merge anchors at identical places — weld anchors that sit at one point;
• ↺ Recalculate all anchors, ⚙ Optimize anchors — recalculate anchors or remove extra ones while keeping the shape;
• ⇄ Reverse direction — reverse the direction of the curves.

• Width segments — how many extra segments run across the wall's width; Segment offset and Spread from centre shift them toward one of the curves or toward the edges;
• Bulge — bend the wall to give the lock volume (0 — flat), Bulge to the other side — bend it the other way;
• Second surface — a second wall between the same curves with its own settings: together they make a closed lock. Available when Bulge is not 0.

• Curve — pick a curve with the right button (Shift — several), then drag a line through it with the left button. In the menu that appears: cut into two curves, cut and delete the upper part or the lower one. The curve's shape is kept.
• NURBS surface — cut a wall in two. Click one of its curves where the cut begins, place anchors across the wall and finish on the second curve; an end not brought to the edge is completed by the program. ✂ Cut (Enter) cuts, Cancel (Esc) cancels.
• Split ends — a click on a curve splits it from that point to the tip into two branches in a Y shape. How far the ends spread is set by Spread (or Ctrl+RMB drag).

Curve modifiers

• Built-in profiles: Quad, Trapezoid, Triangle, Circle, Half circle.
• You can draw a profile yourself in the editor under the list: the left button moves a point (with Shift — with snapping), the right button adds one, a double click deletes. A profile must have at least three points.
• Save preset saves the profile as your preset, Delete preset deletes one of yours (built-in ones remain).

• Start, Middle, End — the start, middle and end of the lock. Each part has its own Radius and Rotation (cross-section rotation), and under the ▸ Profile arrow its own cross-section. = Start profile and = Middle profile copy the cross-section from the previous part.
• A point added to the profile also appears in the other parts. If you bring two points together, they glue into one. Ctrl + drag separates them again.
• Collapse the tip — the lock's end converges to a point (on by default); Tip length — over what fraction of the length it narrows.
• Auto radius picks the radius from the width of your locks (or from the curve's length).
• Select curve selects the source curve. Copy modifier and Paste modifier transfer the profile and all settings to another modifier.
• Convert to curves & walls — a curve is built along each corner of the profile, NURBS walls are stretched between the curves, and you get a closed volume lock. The modifier and the source curve are deleted.

• ◐ Mask — a mask along the lock. Where it is 100%, additional modifiers do not act. In the Affects only block you can list which of them the mask affects: drag them there from the outliner or from the Extra tab, or click ＋. The Ignore checkbox inverts the list: the mask acts on everything except those listed. Clear, Fill and Invert clear, fill and invert the mask.
• ⬤ Thickness — thickness painted with a brush. Orange — thicker (up to ×2), blue — thinner (down to a point).
• ⟳ Twist — twist of the cross-section, also with a brush. Green — clockwise, pink — counter-clockwise (looking from the root along the lock). Angle at 100% sets the rotation angle at full strength.
• ≋ Noise — waves along the lock. Amplitude — how far the lock departs from the path, Frequency — the number of waves. Pure sine turns uneven noise into a clean sine wave, and with both spreads on (Spread ↔, Spread ↕) into a spiral. Plane keeps the noise in one plane, Rotation turns the noise directions at the root, middle and tip, Seed gives another noise variant.
• ➰ Curls — a twist or a volumetric curl. Coil radius sets the coil radius at the root, at 1/3, at 2/3 and at the tip (0 — the lock is only twisted). Density — the number of coils in each quarter. Thickness, Rotation in spiral, Reverse direction and Twist the profile tune the shape. The Anti-clipping sliders (Smooth the path, Shrink on bends, Thin where crowded) keep coils from cutting into each other on bends.

Crown

• Preset — Crown, a regular crown on top of the head, or Bangs, the same shape turned around and shorter front to back: it goes on the forehead with its open bevelled edge toward the crown;
• Symmetric — the new crown is symmetrical about the head's centre (X): an edit on one side is repeated on the other;
• With a continuation — the crown is created with a continuation right away (more on it below).

• Parting line — the parting line;
• Lower connector — the lower line that locks come up to;
• Crown curves — the crown's curves: they run from the lower line to the parting (both ends attached), set the crown's shape and the vertical loops.

• Rings — the number of rings between the lower line and the parting; 0 (auto) — by loop step.
• Whorl — how loops converge at the top, where many of them gather. Merge loops — neighbouring loops below the top merge in pairs (each merge is a triangle). Seam on the crown curve — loops next to the crown curve nearest the top end on it in a herringbone.
• Symmetric — mirrors one half of the crown onto the other; the parting stays in the middle. When you turn it on, the program asks which side to take as the base. Crown curves added later are not mirrored: there is ⇋ Mirror again… for that.

• dragging changes the line's shape;
• Ctrl + drag moves the end along the line;
• Ctrl + click detaches the curve.

Lock extrude

• Click a wall or curve of a flat lock — its whole row is selected. Shift + click adds another lock: a drag extrudes all chosen ones at once.
• LMB ←→ — thickness: right — away from the head, left — toward the head.
• LMB ↑↓ — back segments: curves in the middle of the new side that stick out further than it. One segment is a flat back. Two curves give a pentagon in cross-section, more give a rounded back.
• RMB ←→ — how much the lock narrows toward the root. 100% — thickness fades out at the root.
• RMB ↑↓ — over what fraction of the length the thickness narrows toward the tip.

Welding, zipping and snapping curves

• ⛓ Weld anchors into one — the two anchors become one, both curves pass through it;
• if the start of one curve met the end of another — ⇄ Reverse …, then weld (reverse one curve and weld) or ∿ Join into one curve (merge the two curves into one);
• Don't weld — leave the anchors next to each other but separate.

1. Select the curves to lie along and press Ctrl+C (or the ⧉ SEL button): they are remembered as the path.
2. Shift+RMB on an anchor of the other lock — where the gluing begins → ⇶ Snap to path — onto ….
3. Choose the part: ▲ Upper part or ▼ Lower part from the anchor. On hover you can see which part will lie and where; "partly" means the part is shorter than the path and will not cover its full length.

Braids

• Classic — the outer strand goes over, into the middle;
• Dutch — the outer strand goes under the middle, and the braid stands out above the surface;
• Fishtail — many thin strands, each overlapping half of the others (6 or more);
• Rope — a rope twist: strands are twisted around each other.

• Strands — the number of strands;
• Crossings — how many crossovers along the whole length (for Rope — half-turns);
• Width — the braid's width;
• Depth — how deep strands go over and under each other;
• Strand size — strand thickness;
• Tightness — 0: strands only touch, 1: pressed into each other;
• Rotation — rotation of the braid around the curve; at 0° the flat side faces away from the head.

• Separate — a connector ring around the end of each tube. Move the connector or its anchors and the tube's end follows and takes its shape. If you drag the end of a lock's curve onto a connector, the lock attaches to it and continues the strand;
• Shared — all strands converge into one tube with one connector around it; the connector's shape sets the end's shape;
• Point — no connector, strands converge to a point. Tip rounding: 0 — a sharp tip, 100% — round.

• Make separate tubes — puts the braid's mesh into the scene right away as a separate mesh next to the braid;
• on the general conversion (Convert) the braid becomes its own mesh and is welded to nothing — neither to locks nor to other braids;
• Convert to locks — each strand becomes a curve along its middle with a Tube modifier of its cross-section and thickness, in a separate group, and the braid is hidden. From then on these are regular locks: they can be edited and converted like any others. Before that you set Anchors / crossing (anchors per crossover), Tube thickness (modifier radius) and Point ends collapse (a Point tip converges to a point).

Cocoons

• Rings: On the cocoon — rings on the cocoon's shell, On the lock — rings projected onto the lock's walls (this shows how loops will lie on the mesh);
• Opacity — shell opacity;
• Denser on bends — how much rings crowd on bends (×1 — no crowding);
• Denser to the tip — how much they crowd toward the tip.

Shell modifiers

• Density — more or fewer rings where painted. Click Add density, set the density (×2 — twice as many loops, ×0.5 — half as many) and paint on the cocoon: LMB — paint, Ctrl — erase, Shift — smooth. The mask is visible on the cocoon: dark — weak, yellow — full. Ctrl+Shift paints the second mode, Even spacing (light blue): rings there are placed at equal distances, without crowding on bends and toward the tip; Ctrl+Shift+Alt erases it.
• Parent influence — the strength of the parent's pull. By default a branch inside its parent takes the parent's rings. Where the mask is painted (LMB, red), the influence of the parent and linked cocoons weakens and the cocoon places its own rings even inside them. With Ctrl (green) influence is added instead: the cocoon takes their loops further out, including next to them. Ctrl+Alt — erase, Shift — smooth.

• Line — select a cocoon and drag a line across it: one ring lies in the line's plane. The guide follows the cocoon; to move it, draw a new one and delete the old one. A click on a guide makes it active. A line has an influence zone along the lock, where loops line up parallel to it (0 — only the ring on the line), blending toward the zone's edge, and loop density inside the zone. Linked guides (🔗 Linked settings) change together.
• NURBS disc — a disc across the cocoon: a ring lies on it. If a cocoon is selected, a click on it (or ＋ Create) places a disc across it. If nothing is selected, a horizontal disc goes through all cocoons in the scene, and on each crossed cocoon one ring lies on the disc — this is how loops are aligned across the whole hairstyle. The disc is moved, rotated and scaled (E / R / T) and deformed with a brush; it has Outer radius and Inner radius, buttons to select the outer and inner rings, and Reset deformations. The Cocoons — only these and Cocoons — left out lists (cocoons are dragged into them from the outliner) limit which cocoons the disc acts on.

Checking and preparing for conversion

• Near anchors — anchors of different curves that almost coincide but are not welded are highlighted in orange. Usually they need to be welded: drag one onto the other or use ⛓ Merge anchors at identical places (see "Welding, zipping and snapping curves");
• Degenerate curves — broken curves are highlighted in red: fewer than two anchors, zero length, anchors on top of each other. They are deleted or redrawn;
• Twisted — walls twisted more than the Twist, ° angle per loop step are highlighted in lime. Fix the curves or insert anchors so that the wall turns more smoothly: strongly twisted spots will produce non-planar polygons.

• Loop step — the distance between neighbouring loops along the lock. Double click — enter a number. Set reference shows a cube: click, fit the cube's height to the step you want and click again;
• Deviation — how much a loop's size may differ from the step depending on curvature: with a step of 10 and Deviation of 50%, loops will be from 5 to 15 — shorter on bends, longer on straights. Gaps longer than step × (1 + Deviation) always get extra loops;
• Auto weld points — points closer than the set distance are welded into one (on by default). Weld distance is that distance; auto — a quarter of the loop step, less at the tips. ◎ Pick sets it with a circle at the cursor: size — Ctrl+wheel, click — apply;
• Weld locks — touching locks become one mesh: their points closer than a tenth of the loop step merge (the parent's points stay in place), shared walls and polygons inside another lock are deleted, and small remaining holes are closed.

• if there are no problems — "No faults were found", and you can click Convert right from here;
• if there are — a list of places where locks should weld but their joins are made incorrectly. In the viewport these places are marked with red markers; clicking a row in the list highlights the place.

• fix them by hand — weld anchors, adjust curves — and click Check again;
• if the join is actually correct — RMB on the marker → Ignore: the place turns green and no longer gets into the report (Weld again returns it to the check);
• Auto-fix — the program tries to repair the places itself. Fixes are marked with blue markers: RMB on a marker → Show before / Show after (compare), Accept or Reject; Accept all and Reject all decide for all at once. Places that could not be fixed stay red. Auto-fix is still imperfect: its algorithms are being refined.

Topology room: interface

• Object — whole meshes: a click or box selects, a drag moves. Ctrl+Shift — selecting model polygroups in the viewport: the polygroup under the cursor is highlighted;
• Polygon, Edge, Vertex — polygons, edges and vertices of the active mesh. Shift + click on a mode button converts the current selection to that mode;
• UV — the UV editor. It is still in test mode; there is a RizomUV bridge.

• Snap — edited vertices (when moving, rotating, scaling, entering numbers) stick to the surface of other meshes;
• Symmetry (Shift+X) — vertex edits are mirrored onto their pairs through the mesh's X = 0 plane; vertices on the plane stay on it. The settings button next to it opens the same window as in the Hair room (see "Snapping and symmetry"), plus a UV part;
• snapping mask brush — the same mask as in the Snapping block of the mesh settings;
• Preserve UVs — moved vertices keep their place in the texture: the texture does not swim while you edit the topology;
• Element snap — when dragging selected vertices, the one under the cursor catches on a vertex, edge, polygon or the view grid, and the rest move with it. The settings next to it set what to catch on, the capture radius in pixels, and the view grid's display and step.

Inspector window

• N-gons — polygons with more than four sides, in violet;
• Open edges — open mesh borders (an edge of only one polygon), in yellow;
• Non-manifold edges — an edge shared by more than two polygons, in red;
• Interior markers — stray pieces left inside a mesh (for example, extra polygons inside an open tube), in pink, with a marker visible through the mesh;
• Hard edges — hard edges where shading breaks, in light blue;
• Double walls — polygons lying on top of each other (for example, doubled by a mirror) or partly overlapping each other (an unwelded seam), in hot pink;
• Non-planar — non-planar polygons, in teal. The slider next to it sets how bent a polygon must be to be highlighted: 0 — any bend, 1 — only a corner that has left the plane by half of the longest side.

Selection in the Topology room

• Select Cursor — a click picks, holding LMB paints the selection with a brush; double click — the whole piece; a click and a double click nearby — a loop, and further along it — every Nth element;
• Lasso and Rectangle — encircle with an outline or a box;
• Outline — the open outline (all holes and borders of the mesh) or the border of the selected polygons;
• Loop, Ring, Hard edges — the loop, parallel ring or hard-edge line under the cursor is highlighted, a click picks it (Shift adds, Ctrl removes);
• Fill — the area under the cursor up to a cut or the selection border; Ctrl removes the selected piece.

• Grow / Shrink — grow or shrink the selection by one ring; Invert — invert;
• Select Mirror — move the selection to the other side of X (+X → −X or −X → +X);
• Selection Set — save the selection as a set;
• Mirror — a mirror copy of the selected polygons in the same polygroup;
• Melt — dissolve: for edges and polygons, the edges between them are removed (the polygons merge); vertices dissolve together with the polygons around them;
• Split2PG — selected polygons into a new polygroup;
• Hard Edges / Soft Edges — make edges hard (shading breaks) or soft again;
• Split — detach the selected polygons from the rest; Detach — move them into a separate mesh.

Topology room tools

• Move (E), Rotate (R; with Shift — in 45° steps), Scale (T; with Shift — in 0.1 steps down to zero, that is, to flattening; with Ctrl — uniformly; Ctrl + drag with polygons selected — first Inset, then scale). Settings: gizmo Orientation (World, Local, Normal, Camera, Custom), Free gizmo and Alt + dragging a handle — move the gizmo itself, not the model, Shift step — the move step with Shift, Slide along the edges — vertices slide along their edges and stay on the surface, Align — turn the mesh's own axes to the selection, normal, view or world;
• Brush — a brush over the mesh. Modes Screen, Surface, Topology surface; what LMB does: Move, Smooth, Relax, Inflate or Shrink (RMB in the viewport — choose). Shift — smoothing, Shift+Ctrl — relax, Ctrl — along normals, Ctrl+RMB drag — size and hardness. Relax: keep the stars even — also even out "star" vertices (not four-edged), All meshes — act on all visible meshes under the brush. If there is a selection, the brush works only on it;
• Slide — a drag over an empty spot slides the selected vertices along their edges: LMB — proportionally, RMB — in parallel.

• Relax Mesh (Ctrl+R) — even out the selected vertices (with no selection — all) over the surface; borders stay in place;
• Select N-gons — select all polygons with more than four sides (with Shift — add to the selection);
• Collapse Edge — each selected edge collapses into a vertex (connected edges — into one);
• Snap to the references — the selected vertices (with no selection — all) land on the surface of the references;
• Apply To Identical — the retopology of one part of a high-poly model (selected polygons or the whole mesh) is copied onto all topologically identical parts and onto copies of this mesh, together with UVs, seams, creases and hard edges;
• Virtual symmetry group — see "Virtual symmetry".

• PolyPen — the element under the cursor is highlighted, holding LMB drags it. Clicks draw a polygon (the first point or a double click closes it, Esc cancels). Ctrl + drag — extrude, Ctrl + click — delete, Shift + click — a pivot point, Shift+RMB — fill between points, Ctrl+Shift — Loop;
• Bridge — polygons between two edge chains or two polygon groups. Settings: number of segments, Tension (the bridge's bend), Spin steps (pair rotation), Reverse, Keep original;
• Fill Hole — the hole nearest to the cursor (or all that the selection touches) is shown filled: LMB fills, RMB — next variant, wheel — fill type (Quads, Quads + tris, Tris to a centre, Tris no centre, N-gon). Subdivision — rings of loops into the hole, Edge Flow — the patch continues the surface's shape;
• Bevel / Extrude — extrude the selected polygons: a sideways drag sets how far. Caps on top and bottom, Smart mode (no inner walls where polygons border their neighbours), a proportional bevel on edges, and what to select afterwards. Shift + drag — only pull out, without new polygons;
• Inset — insert polygons inward along the selection's border: Offset, Depth, Preserve groups (the whole area at once or each polygon separately), Scale the inside. On vertices — a circle around each (Radius, Sides, A hole);
• Loop — a cut across a ring of polygons: wheel — how many loops, Shift — by marks, Ctrl — in parallel; LMB cuts, RMB cuts and selects;
• Knife — clicks draw a smooth cut (Esc finishes the curve, Enter cuts), a drag from an empty spot — a straight cut; Ctrl + drag moves a control point, Shift+RMB — menu;
• Plane Cut — drag a line: the mesh is cut by a plane through it (cut, split or delete one side);
• Weld — select and press RMB: weld to a point (onto the vertex under the cursor or to the middle) or in pairs (two edge chains);
• Edge Shaper — a drag over an empty spot: LMB — equal distances between vertices, RMB — Edge Flow, Shift+LMB — onto a plane (three vertices define it), Shift+RMB — into a straight line;
• Smooth EdgeChain — select edges, Shift+RMB — a curve is built along them; move its control points, a click on the curve adds a point; smoothing and alignment are in the settings;
• Mirror — a copy across an axis (the side is found automatically, the seam is welded) or around an axis: Radial, Radial mirror, Radial half ("half a flower"). World or Local axes, Mirror normals, Replace the other side; Virtual symmetry group… gathers meshes into a group with shown but not yet applied symmetry.

Retopology

• Reveal Brush — brush over the ghost: its polygons under the stroke become real and weld to what is already built (if no mesh is chosen, a new RetopoMesh is created). Size — wheel over geometry, Ctrl+wheel or [ and ];

• PolyPen — it catches on the ghost's vertices and edges; Shift+RMB — the ghost polygon under the cursor.

Normals and mesh cleanup

• Average normals — average normals over a smoothed shape: Sphere, Face (with a Nose slider — how much "game-style" face shading: flat cheeks, a nose shadow) and Smoothness; Hard border — the selection border becomes a hard edge;
• Normals brush — paint averaging with a brush; Averaged — the share (0% erases custom normals, returning standard shading);
• Set the direction — normals of the selected vertices along a world axis, Toward the camera, One common normal (the whole area is shaded as one plane);
• Turn the normals… — the next drag in the viewport turns the normals; Copy from a mesh… — take normals from the mesh you click;
• Reset to standard smoothing — return standard smoothing (hard edges remain).

Virtual symmetry

• Mirror — a mirror copy across an axis;
• Radial — copies evenly rotated around an axis;
• Radial mirror — around an axis, each copy and its mirror, a kaleidoscope;
• Radial half — around half a turn, "half a flower".

• Type — the symmetry type;
• Axes (for Mirror) — axes with the side that is kept and mirrored onto the other: X+ / X−, Y+ / Y−, Z+ / Z−. You can turn on several axes — then a copy is made for each of their combinations; clicking again turns an axis off;
• Axis and Copies (for radial types) — the rotation axis through the group's point and the number of copies;
• Weld the seam and Distance — points closer than this distance to the mirror plane are placed on it, and the halves meet without a gap (on Apply the seam is welded);
• ⌖ To a child's local axes — put the group's point and axes onto the gizmo of one of the meshes inside (the meshes themselves do not move).

Hotkeys and pie menus

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