UnityTexturePainter

Simple example of painting straight onto a mesh with a shader.

Video (some genius used the first empty frame as the thumbnail)

• Attach PaintMe.cs to any mesh with a Collider
• When the user clicks, a raycast will try and find any object with PaintAt() on it
• When this is called we grab the UV's where we hit (note: some untextured objects will only have 0,0 for a uv!) and start painting
• The first time, a RenderTexture is setup, copies the texture from the material on us (or clears a colour if no texture) and assigns itself to the material
• then (and on subsequent hits) it will set a point to draw a circle at on a shader, then do a blit onto the existing texture

Not the MOST effecient way, but a thousand times better than using SetPixel. And now you can do shapes, masks, gradients, wobbly effects.

Enjoy!