Yes foliage is still very much a work in progress with Lumen. We don’t yet support the Two Sided Foliage shading model correctly (lighting should enter from the backside of the leaf and have SubsurfaceColor applied). We also have a lot of over-occlusion with Software Ray Tracing, which is the default. It’s something we very much want to improve, but I’m not sure when we will have those solved.
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