Axonometric viewing for skyboxes

Anyone know how to take a 3D skybox and project it onto a 2D plane for ortho viewing? I believe this is called axonometric viewing.

You’re not talking about opengl, are you?

I want to know how to do it in OpenGL. What matrix mode commands…

Why don’t you simply switch to a perspective projection while rendering the skybox? Be sure to switch off depth testing!