Thanks for your answer, I'll keep that in mind! I'm currently working on a tutorial and this is what I got so far. As you can see, the pattern on part 3 looks 'mirrored'. On part 1 and 2, it looks ok. Part 1, 2 and 3 are the same (instances). Why does it looks good on 1 and 2 and why does it looks bad on 3? And, is this a…