I am a little bit confused about the impact of exposure on sRGB values of images.
I expect a linear influence on the intensity and a nonlinear impact on sRGB values.
But darktable behaves different!
Take for example a PNG file with white value sRGB = 255.
If you lower the exposure with -1 EV, the intensity is reduced from 100 % to 50 %.
This has to result in the reduced value sRGB = 188 and not 128!
To my humble understanding the current exposure calculation of darktable 4.01 is not correct.
Thank you for confirmation, comments …