Glossary

2-Sided

Two cubes with their top surface removed.
The one on the right is shown single-sided.
The one on the left is shown as 2-sided.

In gmax, faces and polys are one-sided. The front is the side with the surface normal. The back side of the face is invisible in the viewports; the face appears to be missing when viewed from the back. Objects are usually created with the surface normals facing outward, but it is possible to create objects with the faces flipped or to import complex geometry in which the face normals are not properly unified.

To see both sides of a face, turn on the Force 2-Sided option in the Viewport Configuration dialog.

You can also change normals explicitly by using the Normal modifier.