I know this is just another drop in the bucket of feature requests, and maybe I will get pounded for something that is trivial, but I have been trying to work out a solution for my own and I don’t code (yet).
I was wondering if the UV Projection modifier could be enabled to be a clone source for projection painting, allowing the user to easily rotate/pan/scale the source image and then paint the cloned pixels into the intended target image on the object. That way, I could project my image from camera view, rotate my target object, paint what I need where and then scale up or scale down the camera projector to fit the image to the destination on the target.
If this is already possible somehow, I would appreciate somebody enlightening me. I use 2.57b for everything now, and have had no luck with using the uv projection modifier at all. I downloaded the little house blend that is the online example, and have yet to understand how to set up the target object’s materials to have a UV layer yet have no UV texture as in the file.