Changed error message (relating to pie file load) to display filename.
Wrote code to enable animation on PIE3 files.
Moved texture to new location.
optimised skybox code.
added second skybox to enable 'sky behind clouds' - page-260
Texture only used once (rather than repeated) in skybox.
Undid earlier changes to skybox
Single sun.
check this one out
adding reference points to skybox
