Mesh glitches out when made a little transparent

I want it to NOT do that you can see the inside and everything, I have tried flipping the normals and averaging the normals, nothing works, it looks completely normal when the transparency is 0 but it glitches out when I make it even a little transparent I have also tried making it double sided and changing the render fidelity.

The left is how it looks like with a transparency of 0 and the right with a transparency of 0.02

Any help would be appreciated.
here is the mesh if anyone wants to try it for themselves.
xx.obj (351.3 KB)
rbxl file too
Place1.rbxl (108.2 GB)

1 Like

That’s how it works. Sorry, no fixing this, unfortunately.

In your model try only having the outside triangles modeled. Then try DoubleSided off.

what do you mean by this? can you show me how.