Thank for the link Eric that was helpful. I understand the issue. That bring me to the point now where I think that isn’t the problem. The problem is that the static mesh is made out of lots of smaller intertwined cards. Some of the cards at the back are being rendered in front of the front cards. It’s not clear how the renderer chooses which pixel to be the final one but I’m guessing that the normal of the mesh decides if it should be seen of not. It’s a two sided material. It can be seen clearly when looking at a preview cube in the material editor though. One side of the cube renders correctly when the other three sides renders the back sides of the cubes. Is this expected behaviour with two sided materials?