Does anyone know why when I union objects the material texture becomes warped
Outcome
My studio has been running through problems such as it crashing when i union 2 simple parts and taking too long to union 2 cylinders.
Outcome
Try to use meshparts and be carefull to the category when you post, move this in #help-and-feedback:building-support 
1 Like
Are you using the newest union engine? If so, then that might be where the problem had started.
The new engine is said to have weird behaviors and constantly crashing, maybe go into the settings page and switch over to a different union engine.
I don’t know why it does that exactly, but if you’re going to union something very complex I’d really suggest remaking this in blender, not only is it going to be easier to model and adjust, it’s not going to lag and cause glitches and a million problems like unions usually do. Also you could change the shading options and have so many advantages over roblox in this exact scenario please please use blender for things like this
What’s your shading angle set to?
<90 degrees shade smooth angle will start artifacting. The same with blender stick with something below 90 degrees.
I solved this by disabling the new CSG v3 system.