[UE5.6] Gradient lighting artifacts. How to fix?

Development Rendering
, ,
1

Making a tower defense game. In the current level I’m making, I use blocks that I place side by side to create a path. But the lighting on each block creates a gradient pattern. This only happens on these blocks, not on other paths. You can see the dark triangles that are repeated. I’d like to get rid of these. This is a screenshot of the “Lighting Only” view.

image
image1810×984 70.9 KB

The blocks are static. I’ve tried stationary and movable and no change. I’m using a stationary sky light and directional light. If I turn the directional light off, the effect goes away but everything gets really dark.

As I’m writing this, I set the source angle to 0 on the directional light and this effect went away. Is is ok to keep this at zero? Can someone explain what source angle is supposed to do? Why am I getting those artifacts if it’s not zero?

2

Hi AlienRenders, My first thought is that this might be a problem with the mesh’s normals. Try resetting the normals in modeling mode.

3

Normals was the first thing I checked. The normals are fine in Blender and I’m not recalculating them. I have other shapes that are fine. It’s only this one. I’ll take a look in modeling mode just to see.

edit: I tried recomputing the normals in the modeling mode. Before I confirm, it looks good. But once I accept the results, it goes back to what it was.