Try this: drop this version into your rc3 directory (Note**You cannot use the ZCLauncher to start zc unless you rename it) and set win_proc_fix = 1 in the config file before you run it.
Download: http://www.mediafire...gq5xx/rc3.1.zip
Side Note: The only changes from this build are extra debugging info and a modified DrawLayer() . This is not a replacement for rc3 so use the download link in the first post if you haven't downloaded it yet. This will not run without it.
Ok I tried my DrawLayer test again. DrawLayer() now works MUCH better. The performance seems to be more inline with what I would expect and transparent pixels work. In addition it seems that culling now works as well. Also the coordinate space is also proper now. Rotating seems a little weird but I'll have to look into that more. All in all, very nice improvements.
Should I test DrawScreen() as well? Or has that not been touched yet?