I've was trying to use the Water texture as a bump map and found it had flat areas that I wasn't seeing when i did the same setup in V-Ray for Rhino. After digging through the .vrscene the only major difference was the blender version is adding TexCombineColor nodes between each connection for the multiplier. Manually removing these fixed the issue.
After further testing, the TexCombineColor node is clamping values below 0, causing half of the blue channel in the Water texture to be lost. You can't even add .5 to bring it above or do anything to the Water texture output as it is always forced to go through the TexCombineColor node first making it quite useless.
To ignore the multiplier if it was 1 and this has been working for now but this seems like a major oversight. Probably the best fix would be to make TexCombineColor not clamp values below 0 but that's probably a v-ray core thing right?
I've was trying to use the Water texture as a bump map and found it had flat areas that I wasn't seeing when i did the same setup in V-Ray for Rhino. After digging through the .vrscene the only major difference was the blender version is adding TexCombineColor nodes between each connection for the multiplier. Manually removing these fixed the issue.
After further testing, the TexCombineColor node is clamping values below 0, causing half of the blue channel in the Water texture to be lost. You can't even add .5 to bring it above or do anything to the Water texture output as it is always forced to go through the TexCombineColor node first making it quite useless.
Current:
Expected:
I made a custom build changing this line: https://github.com/ChaosGroup/blender_with_vray_additions/blob/ac206ea015e912b6529d9b637a1e0466edaaa6d7/intern/vray_for_blender_rt/src/scene_exporter/vfb_node_attributes.cpp#L305
To ignore the multiplier if it was 1 and this has been working for now but this seems like a major oversight. Probably the best fix would be to make TexCombineColor not clamp values below 0 but that's probably a v-ray core thing right?