Fix #112018: increase AgX LUT resolution
AgX exhibited some banding-like artifacts that were due to being approximated with a 3D LUT. This commit resolves that by increasing the LUT resolution enough to mitigate the artifacts and make them unnoticeable. Additionally: - The previous LUTs were written in a space-inefficient way, using e.g. "0.000000" instead of "0". The new LUTs are written more efficiently, avoiding quite as dramatic a file size increase as usually accompanies 3D LUT resolution increases. - The previous LUTs included output values greater than 1.0, which was both incorrect for a tone mapper, and also pointless since Blender immediately clips them anyway. The new LUTs clip to 1.0. This also allows the more efficient writing to squeeze even more space savings out of the LUTs. - The previous inverse AgX LUT contained NaNs. Those have been replaced with 0.0 in the new inverse LUT. Note that due to discrepancies between the LUTs previously provided to Blender and the AgX scripts that were later published, the color transform in these LUTs are slightly different. But they are close, and equivalently good. Pull Request: https://projects.blender.org/blender/blender/pulls/113253
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Nathan Vegdahl
Nathan Vegdahl
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