Hi Adrian, I’m not sure, a link to your .blend could be helpful, but at a first glance, I’d say the problem is that you are using generated coordinates, which take the bounding box of your object (the complete truck!) as coordinate system and then you rotate the tipper, which rotates inside the generated coordinate system and you have a Mapping Node with Z-scale set to 20, but the Z doesn’t rotate with the tipper, but stays as “local” Z with regards to the bounding box of the truck.
So the problem lies in the Scratch Node Group…
My guess is, that if you’d make the tipper a separate Object, your shader should work.
Taking the Dot Product between the Geometry Normal and Bevel Normal is perfectly fine! Even better than the Pointiness imho.
