I just have found what to do, to fix 32 bit depth in Rayman 2.
Source:
http://www.jeuxvideo.com/superlumberjack/forums/message/739921747
1. Install nGlide
2. Copy GliVd1vf.dll from folder "Rayman 2\DLL" to folder "Rayman 2\DLL\Glide"
3. Set Glide in GXSetup.exe
4. Edit ubi.ini and replace x 16 to x32
5. Works!
Compatible with widescreen patch
To get nGlide work with Rayman 2,
proceed with instruction and adding missing files from my post, to fix GXSetup crashes:
Impressions
Colors have more depth now. More underlined colors like yellow, red. Maybe even there is less neutrally now. But at least, there is less grey in colors. Even Rayman looks better now, richly. Color of water in Whale Bay, and underwater exploration finally reminds me more some old dev screens/renders. Pretty nice. And I think there is more shading now in certain places.
Share your impressions too.