Why not render the skybox in a seperate blitz program?
Set the graphics resolution so the height of the camera is above 1024, something like 1280x1024.
Set the cameraviewport to 1024x1024.
Render the scene, copy the viewport, 1024x1024 to a 1024x1024 texture.
About space skyboxes. Alot of them i've seen use sprites with space cloud masses drawn on them, and move them around the world. Some are part of the skybox, others you can fly through.
Set the graphics resolution so the height of the camera is above 1024, something like 1280x1024.
Set the cameraviewport to 1024x1024.
Render the scene, copy the viewport, 1024x1024 to a 1024x1024 texture.
About space skyboxes. Alot of them i've seen use sprites with space cloud masses drawn on them, and move them around the world. Some are part of the skybox, others you can fly through.