Quote:
Originally Posted by theDongerr
Question: Since I am running my GPU at 2160p60, Full RGB 4:4:4 8-bit. Should I be telling MadVR that my display's native bitdepth is 8-bit or 10bits (or higher)?
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8-bit. If you send your GPU >8-bit it simply dithers it to 8-bit so you get two dithering steps, madVR dithers to 10-bit then the GPU dithers that to 8-bit. madVR's dithering is higher quality and two dithering steps adds more noise than needed if you can do the bit depth conversion in one step.
Quote:
Originally Posted by theDongerr
Is it possible that my render time is higher than it could be because I have 10 bit (or higher) selected in MadVR despite MadVR dithering 12-bit down to 8-bit?
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No, dithering to 10 bit is not any harder than dithering to 8-bit. madVR cannot dither to >10 bit, it is always dithering from its internal 16 bit data to 10 or few bits. madVR always does its dithering in one step at the end of the rendering pipeline, if it outputs 8 bit it always dithers directly to 8 bit.