Thanks for the idea. I hadn't considered RTT for fullscreen postprocessing shaders, so I experimented with it a bit. I got to the point where I had the camera rendering to a bitmap for a panel covering the full screen at any resolution. Then I realized there was no way to run the bmap object through a shader--at least none that I could find in the docs and on the forum. Everyone seems to agree it's theoretically possible, but no one seems to have code showing how. So, I was stuck again.

Then that led me to discover that A7 allows materials to be applied to views, allowing for fullscreen postprocessing shader effects on the camera view itself without needing Sylex, RTT, or any other workarounds. So, I guess that's one more reason I just need to migrate my project from 6.60 to A7 (along with antialiasing and hopefully an icon fix).

Thanks for the advice. If I'm missing something and it's possible to do this in A6, I'd love to know about it, but for now I'm out of ideas.