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on: December 23, 2020, 02:59:02 pm
C16 means 16 bits per channel integer, not 16 bits per channel floating point (half float), so yes, by nature, it is clamped.
32 bits floating point is the only HDR precision supported by the Substance Engine, so if you need half float textures, you should work in full float precision in SD and convert the resulting textures down to half precision in the end.