Hi Nikola, alas im still getting problems with that paving file. When using a substance I still get the lines, and when using the bitmap versions in the normal shader it doesnt really show up. I have the mapping set to 0.75 cubic. If I switch it between uv and cubic I different outcomes but neither are right. When I set it to 3000% I get the lines back using the bitmap files. No matter which way I try it, there still seems to be an issue for me. Sorry to be the bearer of bad news. Looks like its fixed some stuff for other people so Im not sure why this is such a problem case.
Also to confirm the preview box is black is that right?
Thanks for looking in to this.