Assuming you're using PP2010 with GC enabled:
- incoming colour maps are automatically linearised so they play nicely with the linear maths in the shader nodes
- when you save your render a gamma curve of 2.2 is applied because that's how digital images have to be encoded
- unless, that is, you save your render in HDR or EXR format: these are (I think) 32-bits per colour and remain linear (i.e. no gamma curves are applied)
- this means you have full control over gamma, and lots of other things, in Photoshop and if you use the 'Exposure' adjustment layer it is non-destructive
The best analogy I can think of is when using a digital camera: you have the no-brainer option of shooting to JPEG or the far more flexible option of shooting RAW images.
Windows 10 x64 Pro - Intel Xeon E5450 @ 3.00GHz (x2)
PoserPro 11 - Units: Metres
Adobe CC 2017
