For some reason I couldn't find much relevant information on these subjects. If it isn't very clear from the title, what I'd like to know is: 1. How to combine several identical LDRI with different exposure levels into a single HDRI? 2. What methods of tonemapping are there and how do they work? If anyone could point me to some useful information, it would be highly appreciated, and if you have some good GLSL example code to accompany it, that'd be even better! (Just please don't point me to code without theoretical explanation.) Thank you very much in advance, Mr. Big :D