Okay, found the problem.
This command:
fast_shadow_texture=LoadAnimTexture ("graphics\shadows.png",2+16+32,64,64,0,8)
Fails to load the texture on Intel chipsets.
If I remove the alpha flag it works (but obviously isn't right for my game).
Looks like I need to break it into separate textures rather than use LoadAnimTexture.
A pain, but at least I have a solution.
This command:
fast_shadow_texture=LoadAnimTexture ("graphics\shadows.png",2+16+32,64,64,0,8)
Fails to load the texture on Intel chipsets.
If I remove the alpha flag it works (but obviously isn't right for my game).
Looks like I need to break it into separate textures rather than use LoadAnimTexture.
A pain, but at least I have a solution.