ability to 'draw' on diffuse texture ?

Hey all,
I’m not sure that this post is in the correct area, but I am wondering if it is possible to use the mouse or a pod touch to ‘draw’ a color onto a 512 diffuse texture. Does that make sense? I woudl want to draw a blue line on a white texture and the texture to save the blue line change.
thanks so much,
unity rules!
cp

You can do it using GetPixel/SetPixel and GetPixels/SetPixels, but keep in mind that if you’re doing this in realtime, the texture has to be uploaded every frame. 512x512 would be OK on a modern computer, but will be way too slow on the iPhone.

–Eric