Implementing Smooth Lighting of Speedtree in Unreal Engine 5
polycounter lvl 6
I have a confusion about implementing Speedtree smooth lighting to Unreal. In general, I have seen that people multiply normal maps with TwoSidedSign node, so that the backfacing leaves doesnt flip the normal. It does achieve the smooth shading, but with some added problems :
- It blows up the basecolor a lot, it almost creates white where light hits.
- I have to tweak brightness, contrast and saturation to achieve something pleasing, but that makes the tree overly dark in the shadowy area. Also I feel Subsurface works better before TwoSidedSign multiplication.
- The leaves have very bright reflection from back , which can be reduced with low specular values like 0.1 or less.
- In general I have to tweak the material instance for each type of foliage to get pleasing result,
I feel I am missing something, I have asked this in some places but got no response, So I would really appreciate if someone can help me with this! it is really bugging me forever!
I tried to study the .ST9 material, and seemed to multiply the normal map with TwoSidedSign too.
