While texturing in Substance Painter set to Khronos PBR Neutral, I have noticed strange problems in highlights, or more precisely, ‘when approaching highlights’:
Khronos PBR problems.blend (3.2 MB)
studio_small_08_4k-desat.exr (2.2 MB)
What do you think? 
Just crank up HDRI strenght or expo.
That’s just an inherent tradeoff of how PBR Neutral is designed. It handles bright areas better than Standard, but it’s not made to handle full overexposure. For that, AgX is the only good option. If you want more saturation or contrast, you can tweak it in post.
However, as I have shown in this topic here, AgX changes hue even at proper exposure, which is simply unacceptable.
I did not find an email to Emmett Lalish to show him these problems. Does anybody know how to contact him?
maybe you can use this thread or message privately the author from there.
