9de09220fc
I'm not sure if the Sky was deliberately left out or was just waiting for a better moment, but so many I was disappointed that Sky in EEVEE is completely white. There are already 2 implementations (osl and gpu) so this is the third one. Looking at other cases it seems that we are not supposed to share sources between cycles and the rest? So the new util_sky_model files are just copies of what is already in cycles, except that the data file uses the RGB variant of the Hosek/Wilkie model, because we output RGB anyway (but can be easily changed to XYZ if desired - the results are nearly identical). I am not sure if it is okay to pass 3*9 float values as 3 mat4 uniforms (I wanted to use mat3 but it does not work). Also, should I cache the sky model data between renders if the parameters do not change? Reviewed By: fclem, brecht Differential Revision: https://developer.blender.org/D7108
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