Magic Fill.

Tap anywhere on the model and Magic Fill spreads outward from that point, following the surface until it reaches a natural seam — a crease where two parts meet — and stops. One tap, one part, the active palette colour.

How far it spreads is set by the spread angle, and you control it live: scroll the mouse wheel over the model to open or tighten the fill. It starts tight, at 5°, and nudges one degree at a time, so you can grow the highlight exactly to the edge you want before you commit.

The fill always stops at creases and at any borders you've drawn. Two switches refine how it reads the geometry:

• Catch soft edges — stops the flood at soft part-boundaries that a flat angle misses, like a horn meeting a head, without shattering smooth areas into fragments.
• Close gaps — pulls in skipped slivers so the fill comes out solid, with no holes or jagged edge.

• Your default first move on any model. Most things you want to paint are one tap away.
• Anything with distinct parts — miniatures, mecha, vehicles, props, helmets, panels, plinths.
• When you want one tap to do what a brush would take twenty drags to cover.
• Picking out a single curved surface — a hood, a shield boss, one plate of a many-plate suit — where the spread angle lets you grab exactly that surface and nothing past the next crease.

1. Open the painter and load a model — or click Demo to load the sample robot.
2. Magic Fill is already selected — it's the first tool on the left rail.
3. Tap a part. The fill highlights the area it would paint, in the active colour.
4. Scroll to set the spread. Roll the wheel up to spread further across the surface, down to tighten back toward the seam. The highlight grows or shrinks one degree at a time as you scroll.
5. Tap the highlighted area to commit. The part floods with the active colour. Tap a different spot instead and the seed moves there, so you can re-aim without committing.
6. Switch colour with the number keys. Press 1–9 to pick palette slots directly, then tap the next part. Repeat.

Press Esc to cancel the current highlight without painting. Hold Shift while you commit to erase the fill back to unpainted instead of laying down colour.

• Grabbing too much? Scroll down to tighten the spread, or turn on Catch soft edges so it stops at the part-boundary it was hopping over.
• Fill coming out patchy? Turn on Close gaps — it sweeps in the skipped slivers so the part fills solid.
• It won't stop where you need it to? Draw the edge yourself with Border. Magic Fill treats every border as a hard wall and stops dead at it.
• Two switches, one panel. Catch soft edges and Close gaps live in the right panel under the Setup tab. Not sure what a control does? Flip the ⓘ toggle at the top of the panel for per-control help.