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diff --git a/src/renderergl2/tr_extratypes.h b/src/renderergl2/tr_extratypes.h
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+/*
+===========================================================================
+Copyright (C) 2009-2011 Andrei Drexler, Richard Allen, James Canete
+Copyright (C) 2015-2019 GrangerHub
+
+This file is part of Tremulous.
+
+Tremulous is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 3 of the License,
+or (at your option) any later version.
+
+Tremulous is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+along with Tremulous; if not, see <https://www.gnu.org/licenses/>
+
+===========================================================================
+*/
+
+#ifndef __TR_EXTRATYPES_H__
+#define __TR_EXTRATYPES_H__
+
+// tr_extratypes.h, for mods that want to extend tr_types.h without losing compatibility with original VMs
+
+// extra refdef flags start at 0x0008
+#define RDF_NOFOG		0x0008		// don't apply fog to polys added using RE_AddPolyToScene
+#define RDF_EXTRA		0x0010		// Makro - refdefex_t to follow after refdef_t
+#define RDF_SUNLIGHT    0x0020      // SmileTheory - render sunlight and shadows
+
+typedef struct {
+	float			blurFactor;
+	float           sunDir[3];
+	float           sunCol[3];
+	float           sunAmbCol[3];
+} refdefex_t;
+
+#endif