I have a question for all of the linear work flow people.
When you are working in with floating point color, is there a particular color space that it is associated with? Meaning, is floating point color XYZ? CIE lab? CIE Luv? …or something else besides RGB? …or is it considered a color space itself?
colourspace and colourdepth are different things and dont rule each other out. You can have a linear 8bit pic and you can have an sRGB 32bit float image. Tho in both cases a linear version will yield better (as in correct, not as in appealing) results. That is only valid if your processing tools WORK linear tho. So PS wont help a bit 
Regards,
Thorsten
The color transformation that V-Ray uses for the physical sun and sky and for the VRayIES lights is closest to CIE RGB color space. When you add gamma correction, this becomes close (although not exactly the same as) sRGB color space.
Best regards,
Vlado
thank you.