Why doesn't Blender Game Engine render worm gear mesh with all vertices and textures? Worm gear meshes in Blender Game Engine appear to render without many vertices, and without texture, when running the player. Rendering the same model in the viewport works fine. What is causing this? Is BGE supposed to render all vertices and textures?

Also, text with extruded depth, and texture, gets rendered as 2D text without extrusion or texture. Is this the same problem, or something else?



Update: Also a bug report here: https://developer.blender.org/T53181
The Game Engine by default hides back faces. By disabling backface culling (under the object's properties > material > game settings), I can make it render the faces.