I checked for other tools but found mostly things for Blender, Maya, Unity 3D, etc.
#1: Are there are alternative tools you would recommend? I expect to provide it an input cube-map and have it return the cube-map that I need as a look-up table for IBL.
#2: How would I go about making my own? I am not at all against making my own, especially since that would give me full control over the output format. All I need to know is the basic method in which it is done.
I am guessing that for each pixel on the final IBL cube-map you simply sample a hemisphere of the original cube-map (maybe 256 samples or so?) and sum their weighted lambertian contributions (integrating them). Yes? No? Close? Can’t find much on generating these cube-maps either.
Edited by L. Spiro, 29 May 2013 - 07:05 AM.