Sunday, 11 June 2023

Weird Pinching In Normal Map Render In Unreal Engine

So I spent the last 3 hours trying to figure out why UE5 was rendering weird pinches in my normal map from Substance Painter. Messed with how normals are computed (DirectX, OpenGl, Mikka) within Maya, Substance Painter and UE settings but to no success. 

Until I came across this comment on Reddit from this thread: 

https://www.reddit.com/r/Substance3D/comments/t382lh/whats_going_on_with_my_normals/

Apparently UE5 and Substance Painter triangulates meshes differently which affects the normals...

Solution: export .fbx mesh from Substance Painter to UE5.