07-25-2012, 12:44 PM
I'm sorry, but I couldn't find anything either which is why I just wrote down what I knew while re-checking with a few files I had at hand. There's a bunch of code snippets to be found on google, though. I think there's no official documentation to be found because probably neither Corel (JASC-PAL) nor Microsoft (RIFF) ever published any. For RIFF, all I could find was the general structure of the "Resources Interchange File Format", but nothing about the palette variation.