Simple Painter (Simple Paint 3D) — Runtime 3D Texture Painting for Unity💬 DISCORD | 📖 DOCUMENTATION | 🎮 DEMO 1 | DEMO 2Simple Painter (listed on the Unity Asset Store as Simple Paint 3D) is a runtime 3D texture-painting toolkit for Unity. It lets a game, a configurator, or an editor tool paint directly onto meshes while the game is running — not just a flat colour, but any PBR material channel (albedo, metallic, smoothness, normal maps and more), composited through a multi-layer system similar to a digital image editor.Multi-channel PBR painting — paint Color, Scalar (metallic/smoothness/AO…) and Normal channels independently, each bound to any shader property you define.Photoshop-style layers — every channel on a MultiChannelCanvas or SimulationCanvas holds its own stack of layers with visibility, opacity, a starting texture and a per-data-type blend mode.Three canvas types — a general-purpose layered canvas, a fluid-simulation canvas, and a minimal single-channel canvas for the cheapest possible setup.Six input devices & five stroke methods — all feeding one shared, hot-swappable stroke pipeline.Three fluid solvers — physically simulated wet paint with adhesion, viscosity and cohesive pressure (Viscous), a swirling vorticity-confined ink bloom (Ink), or a cheap drip-and-dry height field (Film) — pick whichever look and budget fit your project.Animated & skinned mesh support — paint directly on moving characters; the live pose is baked automatically.Automatic UV seam fixing — every canvas fixes seams on its own; strokes bleed correctly across UV islands instead of stopping at the cut.Paint progress tracking — measure how much of a channel has been painted or erased, masked to the real UV footprint.Performance-first GPU pipeline — one pooled command buffer per frame, reused render textures, upfront shader warm-up, Job System raycasting and async GPU readbacks.
