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The BRAWL² Tournament Challenge has been announced!

It starts May 12, and ends Sept 12. Let's see what you got!

https://polycount.com/discussion/237047/the-brawl²-tournament

IN PROGRESS: ApplyGGXCurve

While browsing through the calibration profiles for UE4 and Disney GGX, I noticed ApplyGGXCurve-function with an exposure parameter.
Can someone explain why is this curve (and exposure) needed?

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