Certain faces disappear when I hit "P" to start the Game Engine

Game Engine Game Engine Support and Discussion
1

Working on a spaceship for a game. The attached blend file is a “rough draft.” I noticed that when I hit “p” to see how it would render in the game engine, certain faces on the top of the spaceship just disappear. They render fine when I render through Blender Render, but game engine doesn’t see them at all. Looks like a hole in my spaceship. Any thoughts?
cut-off saucer spaceship.blend (503 KB)

2

reverse the normals

3

“Blender game” --> material settings --> turn backface culling off

4

This is a very inefficient solution. Backface culling is a core part for efficient rendering.

Better apply a good topology on your models (see CaptainAndrew’s recommendation).

You can switch backface culling of when:

  • the object is very thin
  • the object is visible from both sides within a small time frame
  • the object has the same material/texture on both sides

Examples: curtains, capes, paper, leaves.
No-go: walls, fences

5

Thanks, reversing the normals did the trick.