Index: sky.h
===================================================================
--- sky.h	(revision 0)
+++ sky.h	(revision 1)
@@ -0,0 +1,33 @@
+#ifndef _SKY_H
+#define _SKY_H
+
+/*=
+Sky and environement boxes
+1900
+**/
+
+// Introduction
+/**
+Skyboxes are mostly automated.
+
+For now, Raydium will use ##BOXfront.tga##, ##BOXback.tga##, ##BOXleft.tga##,
+##BOXright.tga##, ##BOXbottom.tga## and ##BOXtop.tga## and will draw a 
+skybox only if fog is disabled (this is not for technical reasons, 
+but only for realism, just think about it ;)... but you can force 
+skybox with fog using ##raydium_sky_force## if you really want).
+**/
+
+
+extern void raydium_sky_box_cache (void);
+/**
+As skybox texture are sometimes large files, you can pre-load skybox
+with this function. If you don't do it, Raydium will load textures 
+during the first frame of your application.
+**/
+
+extern void raydium_sky_box_render (GLfloat x, GLfloat y, GLfloat z);
+/**
+Internal use.
+**/
+
+#endif