Index: common.h
===================================================================
--- common.h	(revision 334)
+++ common.h	(revision 335)
@@ -246,7 +246,11 @@
 #define RAYDIUM_HDR_PASS			8
 #define RAYDIUM_HDR_EYE_SPEED_DEFAULT		0.1f
 
+#define RAYDIUM_FOG_MODE_LINEAR			GL_LINEAR
+#define RAYDIUM_FOG_MODE_EXP			GL_EXP
+#define RAYDIUM_FOG_MODE_EXP2			GL_EXP2
 
+
 __global int 	 raydium_init_argc;
 __global char  **raydium_init_argv;
 __global char    raydium_init_wd[RAYDIUM_MAX_DIR_LEN];
@@ -369,6 +373,10 @@
 __global GLboolean raydium_render_internal_light_previous_step;
 
 __global signed char	 raydium_fog_enabled_tag;
+__global int		 raydium_fog_mode;
+__global float		 raydium_fog_far;
+__global float		 raydium_fog_near;
+__global float		 raydium_fog_density;
 
 __global signed char	raydium_light_enabled_tag;
 __global signed char    raydium_light_internal_state[RAYDIUM_MAX_LIGHTS];