I'm looking to create a series of six images to build a skybox for a game level. I have a theory of how to do it, but I can't figure out how to make it work in TerraGen 2.
I've got lots of options for skysphere images on the CGTextures site, and I'm thinking that somehow I could map one of those skysphere textures onto a sphere in TerraGen 2, position the camera inside the sphere, and then render six frames that don't require any atmosphere, shadows or practically anything else. Basically this is just a conversion from skysphere to skybox "format."
My main trouble is that, at least by default, TerraGen 2 maps a texture onto the outside of a sphere instead of the inside. How would I get the sky texture "inversely mapped"--a.k.a., mapped onto the inside of the sphere?