I don’t know if this has been solved before, but I was making different environmental models (e.g trees, rocks, sand etc) and when I made my sand floor model, these strange black lines are appearing and the whole thing looks strange (my other models were fine)
I’m not great in texturing but i think that the texture is looping itself in studio, you need to make the texture bigger ( stretch it from properties ( is it called stretch or what lol ) ).
Edit: Play with these for a bit and you will know what i mean