3D Textured Shaded Polygons Not Working

[AlexanderFurby]

Describe the bug

Attempting to switch the viewport camera mode to 3D Textured Shaded Polygons has no effect.

To Reproduce

1. Open hammer.
2. Click on Camera.
3. Select 3D Textured Shaded Polygons.

Issue Map

I am unable to currently provide a download link to the vmf.

Expected Behavior

Faces should become shaded based on their direction when mode is selected.

Operating System

Windows