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diff --git a/engine/decal_private.h b/engine/decal_private.h
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+++ b/engine/decal_private.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+#ifndef DECAL_PRIVATE_H
+#define DECAL_PRIVATE_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "gl_model_private.h"
+#include "idispinfo.h"
+
+#define DECAL_NORMAL 0x00  // Default
+#define DECAL_CUSTOM 0x01  // Clan logo, etc.
+
+// JAY: Compress this as much as possible
+// decal instance
+struct decal_t
+{
+	decal_t				*pnext;				// linked list for each surface
+	decal_t			    *pDestroyList;		//
+	SurfaceHandle_t		surfID;		// Surface id for persistence / unlinking
+	IMaterial			*material;
+	float				lightmapOffset;
+
+	// FIXME:
+	// make dx and dy in decal space and get rid of position, so that
+	// position can be rederived from the decal basis.
+	Vector		position;		// location of the decal center in world space.
+	Vector		saxis;			// direction of the s axis in world space
+	float		dx;				// Offsets into surface texture (in texture coordinates, so we don't need floats)
+	float		dy;
+	float		scale;			// Pixel scale
+	float		flSize;			// size of decal, used for rejecting on dispinfo planes
+	float		fadeDuration;				// Negative value means to fade in
+	float		fadeStartTime;
+	color32		color;
+	void		*userdata;		// For player decals only, decal index ( first player at slot 1 )
+	DispDecalHandle_t	m_DispDecal;	// Handle to displacement decals associated with this
+	unsigned short		clippedVertCount;
+	unsigned short		cacheHandle;
+	unsigned short		m_iDecalPool;		// index into the decal pool.
+	short		flags;			// Decal flags  DECAL_*		!!!SAVED AS A BYTE (SEE HOST_CMD.C)
+	short		entityIndex;	// Entity this is attached to
+
+	// NOTE: The following variables are dynamic variables.
+	// We could put these into a separate array and reference them
+	// by index to reduce memory costs of this...
+
+	int			m_iSortTree;			// MaterialSort tree id
+	int			m_iSortMaterial;		// MaterialSort id.
+};
+
+
+#define FDECAL_PERMANENT			0x01		// This decal should not be removed in favor of any new decals
+#define FDECAL_REFERENCE			0x02		// This is a decal that's been moved from another level
+#define FDECAL_CUSTOM               0x04        // This is a custom clan logo and should not be saved/restored
+#define FDECAL_HFLIP				0x08		// Flip horizontal (U/S) axis
+#define FDECAL_VFLIP				0x10		// Flip vertical (V/T) axis
+
+// NOTE: There are used by footprints; maybe we separate into a separate struct?
+#define FDECAL_USESAXIS				0x80		// Uses the s axis field to determine orientation
+#define FDECAL_DYNAMIC				0x100		// Indicates the decal is dynamic
+#define FDECAL_SECONDPASS			0x200		// Decals that have to be drawn after everything else
+#define FDECAL_DONTSAVE				0x800		// Decal was loaded from adjacent level, don't save out to save file for this level
+#define FDECAL_PLAYERSPRAY			0x1000		// Decal is a player spray
+#define FDECAL_DISTANCESCALE		0x2000		// Decal is dynamically scaled based on distance.
+#define FDECAL_HASUPDATED			0x4000		// Decal has not been updated this frame yet
+
+// Max decal (see r_decal.cpp for initialization).
+extern int g_nMaxDecals;
+
+struct worldbrushdata_t;
+void R_DecalUnlink( decal_t *pdecal, worldbrushdata_t *model );
+
+#endif			// DECAL_PRIVATE_H