Runtime Graffiti / Spray Paint System is a Unity asset for adding interactive spray painting to first-person games, sandbox projects, urban environments, and creative gameplay systems.

The package lets players spray paint directly onto walls and UV-mapped objects during runtime. Paint is applied through mesh UV coordinates, so drawings appear on the actual surface instead of being placed as decals. Fast mouse movement is interpolated into continuous strokes, helping lines feel smooth instead of dotted.

Included features:

Runtime spray painting on paintable mesh surfaces Right mouse button eraser Save and load system for painted textures Auto-save after painting or erasing First-person player controller Spray can view model Spray particle effect Color palette switching Demo scene with paintable walls and props Materials, meshes, icons, and prefabs Editor builder for regenerating the demo setup English documentation in TXT, MD, and PDF formats The system is customizable through Inspector fields such as brush radius, hardness, opacity, eraser size, paint range, texture resolution, save IDs, base colors, and selectable color palette.

Suitable for graffiti games, urban exploration, sandbox tools, horror or stealth games with marking mechanics, multiplayer hangout prototypes, level annotation tools, and any project that needs runtime drawing on world objects.