P.S.: Please find here the results for the wider color ramp (RGB values 16, 32, 64,128,255 in the texture):

50% light: 15,29,56,100,161
75% light: 22,42,80,135,198
100% light: 30,55,101,161,221
 

What can be observed very nicely is, that the values for 50% light and 100% light correspond to each other, i.e. identical values of the product of RGB texture amount and light intensity are still mapped to the same render image color.

This might seem trivial, but i currently have trouble to get even roughly related results with Carrara, no matter if with or without gamma correction.