Hello! I tried to export this cliff from blender and import it into unreal, but when I apply the material artifacts appear. I tried to smooth the surface in blender, also tried to delete and recreate this atrtribute from Modelling Mode but noting seems to work. any idea on how to fix it?
these artifacts keep apearing everywhere when there are normal maps in the material
Hi there, this looks to me like it could be your mesh and your normal map being out of sync with each other and because of this you are getting artifacts along uv seams. Did you make sure that the low poly mesh you baked the normals on to is the exact same mesh as the one used in unreal engine? Also you didn’t change the normals in Unreals import settings?
The other thing that often goes wrong is the green channel of the normal map, depending on how you output your normal map you may need to flip the green channel (though the results I’m seeing in your images don’t look like that particular issue.)
There is also the matter of that lerp_texture node in your material, that might be the problem as normals can sometimes become broken when you try to combine or lerp them together. Can you show what that node is doing?
Other checks to do: Does this material work with other normal maps? Does this material work on other models?
Your normal map isn’t using the right texture compression settings for the texture. Double click the texture in the asset browser and change the compression settings to NormalMap.
Normal map textures should look blue in the material editor.
