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It is not a linear space. A fixed scale can not fix the problem but I assume it is exactly what you are trying to show.CodeHD wrote: Wed Nov 25, 2020 12:09 pm If we compute the ratio of this factor for gamma 2.2 and 1.0 we get 0.39.
Yes, the factor 0.39 is specific to the LUXLINEAR tonemapper when comparing between gamma 1.0 and 2.2.Dade wrote: Wed Nov 25, 2020 12:54 pm It is not a linear space. A fixed scale can not fix the problem but I assume it is exactly what you are trying to show.
Code: Select all
film.imagepipelines.1.0.type = "NOP"
film.imagepipelines.1.1.type = "NOP"
film.imagepipelines.1.2.type = "TONEMAP_LUXLINEAR"
film.imagepipelines.1.2.sensitivity = "100"
film.imagepipelines.1.2.exposure = 0.1
film.imagepipelines.1.2.fstop = 22
film.imagepipelines.1.3.type = "GAMMA_CORRECTION"
film.imagepipelines.1.3.value = "2.2"
film.outputs.2.type = "RGB_IMAGEPIPELINE"
film.outputs.2.index = 1
film.outputs.2.filename = "c:\Bartek\stack\LuxCoreTests\exrGammaProblems\rgb_g22.png"
film.imagepipelines.3.0.type = "NOP"
film.imagepipelines.3.1.type = "NOP"
film.imagepipelines.3.2.type = "TONEMAP_LUXLINEAR"
film.imagepipelines.3.2.sensitivity = "100"
film.imagepipelines.3.2.exposure = 0.1
film.imagepipelines.3.2.fstop = 22
film.imagepipelines.3.3.type = "TONEMAP_LINEAR"
film.imagepipelines.3.3.scale = "0.39"
film.outputs.6.type = "RGB_IMAGEPIPELINE"
film.outputs.6.index = 3
film.outputs.6.filename = "c:\Bartek\stack\LuxCoreTests\exrGammaProblems\rgb_noGamma_tonemaper.exr"