Index: init.c
===================================================================
--- init.c	(revision 728)
+++ init.c	(revision 729)
@@ -164,6 +164,7 @@
 raydium_file_log_fopen_index=0;
 raydium_frame_time=0;
 raydium_capture_asked=RAYDIUM_CAPTURE_NONE;
+raydium_sky_prefix_defined=0;
 
 raydium_ode_timestep = (0.006f);
 raydium_ode_physics_freq = 400;
g 
+quaternion.
+Quite usefull for making rotations over quaternions.
+Here a list of common quaternions:
+ W X Y Z
+ 1,0,0,0 	 				Identity quaternion, no rotation
+ 0,1,0,0 					180' turn around X axis
+ 0,0,1,0 					180' turn around Y axis
+ 0,0,0,1 					180' turn around Z axis
+ sqrt(0.5),sqrt(0.5),0,0	90' rotation around X axis
+ sqrt(0.5),0,sqrt(0.5),0	90' rotation around Y axis
+ sqrt(0.5),0,0,sqrt(0.5)	90' rotation around Z axis
+ sqrt(0.5),-sqrt(0.5),0,0	-90' rotation around X axis
+ sqrt(0.5),0,-sqrt(0.5),0	-90' rotation around Y axis
+ sqrt(0.5),0,0,-sqrt(0.5)	-90' rotation around Z axis 
+TODO: Those could be added like defines
+**/
+
+
 __rayapi float raydium_math_angle_from_projections(float px, float py);
 /**
 This function will return the real angle (in radians) for a pair of X