Paul, thanks for the information, I think I was able to fix it for two days, but I reached some compromise, I have the roof made as I wanted, but now I have another problem, I had a spline with 3 different IDs, each time when I chose a different id the building appeared on a specific spline but when I introduced splineoffset and added a new ID in it, this function stopped working as it should. Could you go inside the generator and see if it can be repaired, because now, despite the fact that I change id, the roof stays on others. The whole generator is well done for this function, but as I wrote through splineoffset ID everything was complicated and I don't know how to fix it now