I’m having an issue whereby when using a material instance constant of a base material, I’m seeing very different results compared to a standard material using exactly the same texture inputs:
The cube on the left is using a material instance constant and the cube on the right is using a secondary base material with exactly the same texture params as the mat inst.
This issue only seems to occur if the normal map in the first base material differs from that being used in the mat inst that is instancing it.
Here’s a sample .upk showing the issue: https://drive.google.com/open?id=1YS…iLzwxXs7Ap8HEG
The two cubes should look identical, but are wildly different. Anyone know what is happening here?