UE FACETED SMOOTHING GROUPS AFTER BAKING (Luoshuang's GPULightmass)

[christianstamati]

Hi,
I’m trying to bake a scene with rounded objects and I’m currently having problem with smoothing groups. I created this simple scene made of a plane a cylinder and a point light. To bake the scene I’m using Loushuang’s GPULightmass plugin on RTX project and I’m using Unreal Engine 4.26 dev-rendering. (I also tried on 4.24.3 the problem is the same)

• To make shadow softer I increased Soft Radius to 100 (even if it’s 0 the problem will be the same)
• The Cylinder has lightmap resolution to 1024px
• If I set Cylinder’s lightmap resolution to something like 64px the artifact seems to disappear but I will have more EDGE BLEEDING
• The artifact will appear only when I BAKE light, in real time it’s working perfectly the surface is SMOOTH

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SCENE SETUP:

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UV 0:

UV 1:

UE 4.24.3 + Default Baking + Source Radius of pointlight

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UE 4 24.3 + GPU Lightmass

[anonymous_user_68e1492a]

The problem happens will all ray-tracers, including Path tracers.
The ray-tracers always looks at the geometry non-interpolated and faceted. Phong tesselation before raytracing could be a good idea? Thoughts Epic?

[anonymous_user_68e1492a]

The Shadow Terminator Problem. Google it. Epic, what do you suggest we do?