diff --git a/d1x-rebirth/main/lighting.h b/common/main/lighting.h
similarity index 100%
rename from d1x-rebirth/main/lighting.h
rename to common/main/lighting.h
diff --git a/d2x-rebirth/main/lighting.h b/d2x-rebirth/main/lighting.h
deleted file mode 100644
index 391321f43..000000000
--- a/d2x-rebirth/main/lighting.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
-THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
-SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
-END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
-ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
-IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
-SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
-FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
-CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
-AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
-COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
-*/
-
-/*
- *
- * Lighting system prototypes, structures, etc.
- *
- */
-
-
-#ifndef _LIGHTING_H
-#define _LIGHTING_H
-
-#define MAX_LIGHT       0x10000     // max value
-
-#define MIN_LIGHT_DIST  (F1_0*4)
-
-extern fix Beam_brightness;
-extern g3s_lrgb Dynamic_light[MAX_VERTICES];
-
-extern void set_dynamic_light(void);
-
-// Compute the lighting from the headlight for a given vertex on a face.
-// Takes:
-//  point - the 3d coords of the point
-//  face_light - a scale factor derived from the surface normal of the face
-// If no surface normal effect is wanted, pass F1_0 for face_light
-fix compute_headlight_light(vms_vector *point,fix face_light);
-
-// compute the average dynamic light in a segment.  Takes the segment number
-g3s_lrgb compute_seg_dynamic_light(int segnum);
-
-// compute the lighting for an object.  Takes a pointer to the object,
-// and possibly a rotated 3d point.  If the point isn't specified, the
-// object's center point is rotated.
-g3s_lrgb compute_object_light(object *obj,vms_vector *rotated_pnt);
-
-// turn headlight boost on & off
-void toggle_headlight_active(void);
-
-#endif /* _LIGHTING_H */