Skybox.
typedef struct Skybox { uint sig; byte wobj[192]; } Skybox;

Enable skybox.
API void SkyboxEnable(Skybox *skybox);
skybox: Skybox.

Disable skybox.
API void SkyboxDisable(Skybox *skybox);
skybox: Skybox.

Initialize skybox.
API void SkyboxInit(Skybox *skybox, wcstr name);
skybox: Skybox.
name: Name.

Release skybox.
API void SkyboxRel(Skybox *skybox);
skybox: Skybox.