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Vikram Bhaskaran
a81c98d33c
The modern curve used g = 2^(2c), so Contrast 100 crushed 0.25 to about 8/255 while AE is about 40/255. Brightness is now a pin-black-and-white power toward white or black, then a milder S-curve g = 1 + 0.53 c, fitted to kasper9n's AE grey ramps. Legacy linear mode is unchanged. The GPU kernel matches the CPU.