Union Creating invisible walls

[Crazycatwastaken]

I am making a few unions in my walls for door’s I am going to be placing in, however when I try and go through it acts as the wall is still there. Is there any way to fix this?

• I am wishing to find a fix is this issue.
  *My union
  Gif of the problem https://gyazo.com/a32db14c9e41210f8070e906efc0cacd
  *I’ve tried unioning it and trying different union’s.

[CriticalDucky]

I once had that problem on one of my builds, but I fixed it by resizing a part through the doorway, negating it, and then unioning everything.

[yh8]

This is actually a union glitch that tends to happen often for some reason, (In case you haven’t) try to create the wall and union a door slot through it. That should mostly likely fix it.

[Bili_Billie]

Theres a solution to this on Youtube. Basically you have to split the Union in half and put them together.

Heres the video:

Fixing Roblox Collisions Tutorial