I don’t know if this applies to any of you but in the last few days, Roblox has been extremely slow in terms of unioning/negating. I’ve always been on the same “version” of CSG too. Unions that I used to be able to union together with others before now either result in a CSG error -8 or -10, or just my studio freezing completely. It’s getting frustrating and I’ve pretty much had it. I have a friend in a Team Create place who tried unioning the same parts and it came up with the same results. Let me know if you guys are experiencing the same thing.
Don’t know what you’re talking about. Exactly what are you unioning? Maybe it’s something to do with model complexity?