Object with custom collision not displaying correctly

I have made an object with custom collision in 3DS Max, see picture

However when it is imported into Unreal it only displays half of the object, but when viewed from the other side it would display the other side of the object. Does anyone know why it is doing this? The collision works completely fine, it even works on the side of the object that is not displaying.

Hi,
Make sure your material is set to “two-sided”
If the mesh/object has no material assigned create one and set it to two-sided.
The issue is that you use planes and the normals to display (render/calculate) are directed outwards.
(That’s why you can look through the plane from the inside)

Make sure all normals are facing the correct way. (You then don’t need a two-sided material)

Legend, thanks a lot!