
1. Engine: Blender Game
- Info menu >> Render Engine box >> Blender Game
Note:
- There are menus that are only available when the Blender Game render engine is selected.

2. Create the model
- 3D View menu >> Add >> Mesh >> Cube
- 3D View menu >> Mode box >> Object Mode
Note:
- For this tutorial, the model I'm using is a cube.

3. Create replacement mesh
- 3D View menu >> Add >> Mesh >> UV Sphere
- 3D View menu >> Mode box >> Object Mode
Note:
-
The replacement mesh is a mesh from another model
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The model with the replacement mesh can be on any layer in the blend. The layer can be hidden or visible
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The model with the replacement mesh can be any size and shape
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For this tutorial, the replacement mesh is a UV Sphere.