Exporting Objects from Blender into Your iPhone App

As OpenGL ES provides no standard format for importing 3D meshes, you will need external tools to display non-trivial 3D meshes in your app. Blender is a well-known open-source 3D modeling tool (of course you can do almost everything else 3D-related).

Here is a good tutorial which shows you how to export your meshes from blender to a format that can be used in OpenGL ES applications, for instance on the iPhone:

• Blender to iPhone, part 1 (Blender & Python scripting)
  
• Blender to iPhone, part 2 (export from Blender and import to Obj-C)
  
• Blender to iPhone, part 3 (textures and UV mapping)