Shape.

Shape paints clean geometry straight onto the mesh. Pick line, rectangle, or circle, drag it out on the model, and the faces under it take the active filament color. Before it paints, Layerpaint subdivides the surface along the shape's edge, so the boundary follows your line instead of the mesh's triangles — a crisp stripe on a 5,000-triangle mesh looks just as sharp as on a 500,000-triangle one.

Nothing bakes in on release. The shape settles as a preview you can move and resize — drag it to reposition, grab a handle to change its size, then hit Apply. Not right? Esc discards it, and after an apply a single Ctrl+Z removes the whole shape, added triangles and all.

Rectangles and circles come in Fill or Outline; lines and outlines have a width slider. A small dock next to the palette holds the shape and style pickers, so the shape and the color sit in one reach.

• Stripes — racing stripes down a car shell or helmet, a waistband on a figure, trim along an edge.
• Blocks and panels — a rectangle of color for a screen, a badge field, a painted panel line.
• Circles and rings — a filled dot for an eye or a port, an outline ring around a dial or an emblem.
• Anywhere freehand wobbles — the brush follows your cursor; Shape follows geometry.

1. Pick the Shape tool in the toolbar. The shape dock appears next to the palette.
2. Choose the shape and style. Line, Rect, or Circle; Fill or Outline for the closed shapes. Line width and outline stroke have a slider (2–120 px).
3. Pick a color. The shape paints in the active palette chip.
4. Drag on the model. Hold Shift to constrain — a line snaps to 45°, a rectangle to a square. Esc cancels mid-drag.
5. Adjust the preview. Drag the shape to move it, grab a handle to resize. Orbit the model by dragging outside it.
6. Hit Apply. The surface subdivides along the edge and the shape paints. One Ctrl+Z undoes the lot.

• It paints what faces you. Shape covers the front faces under it. If a big shape reaches around to a hidden part of the model, use Isolate to cut the far side away first, or apply from two views.
• Line up the camera first. The shape projects from your current view, so a stripe that should run straight down the hood wants a straight-on camera. Shift-constrained lines keep it square.
• Stack shapes for patterns. Two applied stripes make a double racing stripe; a filled circle with an outline ring in a second color makes a roundel.
• Pairs with Symmetry. With a mirror axis on, the shape lands on both sides at once.