Hi, I’m getting some weird shadow offset artefact with foliage in UE5. Hope you can help!
Observe the edge of the grass blades are illuminated when backlit by the light source. You can see the thin slither of light on the right side of each blade. Also tested with all light types. Tested with both procedural foliage and static mesh actor.
In order to rule out any asset related issues, I’ve stripped it back to a standard masked material with opacity only and default mesh normals.
Foliage isnt solid. Its not translucent.
It renders with very specific subsurface scattering.
Omitting the parameter will almost always result in odd renders.
In your case, it seems its lit like a lightbulb.
This isn’t necessarily wrong since when shining light though a leaf of grass the color will always be lighter.
Rendering as a solid, will almost always have issues when the light is supposed to pass through the leaves (But it wont light up as a lightbulb).
At a distance, the mip level of the opacity may need to be bumped up from the default to retain the edge.
You may also need to switch from tsr to taa to get that to work.
