He yall, im a bit new to collision groups but I have a little problem.
So i have my collisions set up like this:

I did this so a ball in a specific area doest go out. But i have run into a wierd problem.
Im using robloxes default cars but i decorated it a bit but they keep gettinf stuck on the wall despite not having the default collision group set


The wierd thing is that i looked everywhere in the scripts and the parts but nothing has any other collision group other then Default.
I only saw this but i dont know why it does that.

Did you try directly changing the collision group of all the model’s children?
Yeah i think i did. But how do i make sure? If i select the moddle and children, there are moddles inside the moddles and there are parts that are inside of parts. Its the offical Roblox buggy btw
If there’s parts inside other models (that are also inside the buggy model) you’ll have to select all the parts and change their collision group
I believe a script changes the collision group of a main part to “Default” each frame. Try to find the script and change it or…
just disable “CanCollide”, though it might not work if it’s a part responsible for keeping the vehicle above ground.
It should be default, the collision group is set up in such a way that only the ball can colide (Collision group 2) with the wall ( Collision group 1 )
Did that but it still gets caught up in the wall, It should have Default collsision group and only collision group 1 should collide with 2.
I’m not really familiar with collosionGroups but from what i’m seeing in the screenshot you’ve provided in your original post i can see that the default collision group can collide with the 2nd collision group. Try checking off that case and try again.

The ball should colide with default so people / cars can push it around.