I've been using Helge's great camera projection shader in the RenderTree:
http://www.xsi-blog.com/archives/225
But, I've got a slight problem when it comes to rendering out the projection, painting on it and then reapplying it via the shader. If I render from the projection camera the fov shifts slightly so that it no longer matches the original projected image. I noticed, too, that if you change the fov of the camera hooked into Helge's node then the camera projected image starts to shrink slightly with higher fovs - it doesn't 'stick' like a normal camera projection would(even though there's an expression binding the shader's fov with the target camera's fov).
Anyone else seen this? (This is under 6.5/32bit, 5.11/32bit).
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