Not sure what the problem might be. Whether it's RS related or more on the Houdini side, but there's definitely something fishy.

As soon as I rotate the object on it's y axis the highlights start to rotate. Since the "brush/scratch" rotation stays relatively the same, this shouldn't happen.

What can be the cause? I thought it might be related to the tangents calculated by Houdini. That's my only guess. Or does RS need a vector map for anisotropic directions? Usually the greyscale map is the one to go for, right?

Anybody an idea what's wrong with this setup?


Cheers
Tom