How to detect if a part is completely within another part?

You should try converting the CFrames into ObjectSpace.

Yeah… figured. I’ll see if I can think of a solution later

Sorry for super late reply, but I’m pretty sure I just fixed this. I had to get the position of all eight corners of the part

Edit: Yep, it works 100%. Thanks for helping me with this :slight_smile:

Ohhhh, that makes sense. I would’ve thought the 2 corners would work, but I guess I was wrong. Good to know, though; glad you found the solution! :slight_smile: