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diff --git a/hammer/render3dms.h b/hammer/render3dms.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef RENDER3DMS_H
+#define RENDER3DMS_H
+#pragma once
+
+
+#include "Render.h"
+#include "mathlib/Vector4D.h"
+#include "utlpriorityqueue.h"
+#include "mapclass.h"
+#include "lpreview_thread.h"
+#include "shaderapi/ishaderapi.h"
+
+//
+// Size of the buffer used for picking. See glSelectBuffer for documention on
+// the contents of the selection buffer.
+//
+#define SELECTION_BUFFER_SIZE	50
+
+//
+// Size of the texture cache. THis is the maximum number of unique textures that
+// a map can refer to and still render properly in the editor.
+//
+#define TEXTURE_CACHE_SIZE		2048
+
+//
+// Maximum number of objects that can be kept in the list of objects to render last.
+//
+#define MAX_RENDER_LAST_OBJECTS	256
+
+//
+// Maximum number of hits that can be returned by ObjectsAt.
+//
+#define MAX_PICK_HITS			512
+
+
+class BoundBox;
+class CCamera;
+class CCullTreeNode;
+class CMapClass;
+class CMapDoc;
+class CMapFace;
+class CMapInstance;
+class CMapWorld;
+class IMaterial;
+class IMaterialVar;
+template< class T, class A >
+class CUtlVector;
+
+enum Visibility_t;
+enum SelectionState_t;
+
+
+typedef struct TranslucentObjects_s {
+	float			depth;
+	CMapAtom		*object;
+
+	bool			m_bInstanceSelected;
+	TInstanceState	m_InstanceState;
+} TranslucentObjects_t;
+
+
+enum RenderState_t
+{
+	RENDER_CENTER_CROSSHAIR,		// Whether to draw the crosshair in the center of the view.
+	RENDER_GRID,					// Whether to draw a projected grid onto solid faces.
+	RENDER_FILTER_TEXTURES,			// Whether to filter textures.
+	RENDER_POLYGON_OFFSET_FILL,		// Whether to offset filled polygons (for decals)
+	RENDER_POLYGON_OFFSET_LINE,		// Whether to offset line polygons (for wireframe selections)
+	RENDER_REVERSE_SELECTION,		// Driver issue fix - whether to return the largest (rather than smallest) Z value when picking
+};
+
+
+//
+// Render state information set via RenderEnable:
+//
+typedef struct
+{
+	bool bCenterCrosshair;	// Whether to render the center crosshair.
+	bool bDrawGrid;			// Whether to render the grid.
+	float fGridSpacing;		// Grid spacing in world units.
+	float fGridDistance;	// Maximum distance from camera to draw grid.
+	bool bFilterTextures;	// Whether to filter textures.
+	bool bReverseSelection;	// Driver issue fix - whether to return the largest (rather than smallest) Z value when picking
+} RenderStateInfo_t;
+
+static inline bool RenderingModeIsTextured(EditorRenderMode_t mode)
+{
+	return (
+		(mode==RENDER_MODE_TEXTURED) || 
+		(mode==RENDER_MODE_TEXTURED_SHADED) || 
+		(mode==RENDER_MODE_LIGHT_PREVIEW_RAYTRACED) || 
+		(mode==RENDER_MODE_LIGHT_PREVIEW2) );
+}
+
+//
+// Picking state information used when called from ObjectsAt.
+//
+typedef struct
+{
+	bool bPicking;							// Whether we are rendering in pick mode or not.
+	unsigned int m_nFlags;					// flags
+
+	float fX;								// Leftmost coordinate of pick rectangle, passed in by caller.
+	float fY;								// Topmost coordinate of pick rectangle, passed in by caller.
+	float fWidth;							// Width of pick rectangle, passed in by caller.
+	float fHeight;							// Height of pick rectangle, passed in by caller.
+
+	HitInfo_t *pHitsDest;				// Final array in which to place pick hits, passed in by caller.
+	int nMaxHits;							// Maximum number of hits to place in the 'pHits' array, passed in by caller, must be <= MAX_PICK_HITS.
+
+	HitInfo_t Hits[MAX_PICK_HITS];	// Temporary array in which to place unsorted pick hits.
+	int nNumHits;							// Number of hits so far in this pick (number of hits in 'Hits' array).
+
+	unsigned int uSelectionBuffer[SELECTION_BUFFER_SIZE];
+	unsigned int uLastZ;
+} PickInfo_t;
+
+
+typedef struct
+{
+	IEditorTexture *pTexture;		// Pointer to the texture object that implements this texture.
+	int nTextureID;			// Unique ID of this texture across all renderers.
+	unsigned int uTexture;	// The texture name as returned by OpenGL when the texture was uploaded in this renderer.
+} TextureCache_t;
+
+
+typedef struct
+{
+    HINSTANCE        hInstance;
+    int              iCmdShow;
+    HWND             hWnd;
+	HDC				 hDC;
+    bool             bActive;
+    bool             bFullScreen;
+    ATOM             wndclass;
+    WNDPROC          wndproc;
+    bool             bChangeBPP;
+    bool             bAllowSoft;
+    char            *szCmdLine;
+    int              argc;
+    char           **argv;
+    int              iResCount;
+    int              iVidMode;
+} MatWinData_t;
+
+
+class CRender3D : public CRender
+{
+public:
+
+	// Constructor / Destructor.
+	CRender3D(void);
+	virtual ~CRender3D(void);
+
+	// Initialization & shutdown functions.
+	void ShutDown(void);
+
+	float GetElapsedTime(void);
+	float GetGridDistance(void);
+	float GetGridSize(void);
+	
+	bool DeferRendering() const { return m_DeferRendering; }
+	bool IsEnabled(RenderState_t eRenderState);
+	bool IsPicking(void);
+
+	virtual bool IsInLightingPreview();
+	virtual void SetInLightingPreview( bool bLightingPreview );
+	
+	// Operations.
+	
+	float LightPlane(Vector& Normal);
+	void UncacheAllTextures();
+
+	bool SetView( CMapView *pView );
+	void StartRenderFrame(void);
+	void EndRenderFrame(void);
+
+	virtual	void						PushInstanceData( CMapInstance *pInstanceClass, Vector &InstanceOrigin, QAngle &InstanceAngles );
+	virtual	void						PopInstanceData( void );
+
+	void ResetFocus();
+
+	// Picking functions.
+	void BeginRenderHitTarget(CMapAtom *pObject, unsigned int uHandle = 0);
+	void EndRenderHitTarget(void);
+
+	void Render(void);
+	void RenderEnable(RenderState_t eRenderState, bool bEnable);
+
+	void RenderCrossHair();
+	virtual void RenderWireframeBox(const Vector &Mins, const Vector &Maxs, unsigned char chRed, unsigned char chGreen, unsigned char chBlue);
+	void RenderBox(const Vector &Mins, const Vector &Maxs, unsigned char chRed, unsigned char chGreen, unsigned char chBlue, SelectionState_t eBoxSelectionState);
+	void RenderArrow(Vector const &vStartPt, Vector const &vEndPt, unsigned char chRed, unsigned char chGreen, unsigned char chBlue);
+	void RenderCone(Vector const &vBasePt, Vector const &vTipPt, float fRadius, int nSlices,
+		            unsigned char chRed, unsigned char chGreen, unsigned char chBlue );
+	void RenderSphere(Vector const &vCenter, float flRadius, int nTheta, int nPhi,
+							  unsigned char chRed, unsigned char chGreen, unsigned char chBlue );
+	void RenderWireframeSphere(Vector const &vCenter, float flRadius, int nTheta, int nPhi,
+							            unsigned char chRed, unsigned char chGreen, unsigned char chBlue );
+	void RenderInstanceMapClass( CMapInstance *pInstanceClass, CMapClass *pMapClass, Vector &InstanceOrigin, QAngle &InstanceAngles );
+	
+
+	int ObjectsAt( float x, float y, float fWidth, float fHeight, HitInfo_t *pObjects, int nMaxObjects, unsigned nFlags = 0 );
+
+	void DebugHook1(void *pData = NULL);
+	void DebugHook2(void *pData = NULL);
+
+	// indicates we need to render an overlay pass...
+	bool NeedsOverlay() const;
+
+	void BuildLightList( CUtlVector<CLightingPreviewLightDescription> *pList ) const;
+
+	void SendLightList();									// send lighting list to lighting preview thread
+	
+	void SendShadowTriangles();
+	void AddTranslucentDeferredRendering( CMapPoint *pMapPoint );
+
+protected:
+
+	inline void DispatchRender3D(CMapClass *pMapClass);
+
+	// Rendering functions.
+	void RenderMapClass(CMapClass *pMapClass);
+	void RenderInstanceMapClass_r(CMapClass *pMapClass);
+	void RenderNode(CCullTreeNode *pNode, bool bForce);
+	void RenderOverlayElements(void);
+	void RenderTool(void);
+	void RenderTree( CMapWorld *pWorld );
+    void RenderPointsAndPortals(void);
+	void RenderWorldAxes();
+	void RenderTranslucentObjects( void );
+
+	// Utility functions.
+	void Preload(CMapClass *pParent);
+	Visibility_t IsBoxVisible(Vector const &BoxMins, Vector const &BoxMaxs);
+
+	// Frustum methods
+	void ComputeFrustumRenderGeometry(CCamera * pCamera);
+	void RenderFrustum();
+
+	float m_fFrameRate;					// Framerate in frames per second, calculated once per second.
+	int m_nFramesThisSample;			// Number of frames rendered in the current sample period.
+	DWORD m_dwTimeLastSample;			// Time when the framerate was last calculated.
+
+	DWORD m_dwTimeLastFrame;			// The time when the previous frame was rendered.
+	float m_fTimeElapsed;				// Milliseconds elapsed since the last frame was rendered.
+
+	// context for the last bitmap we sent to lighting preview for ray tracing. we do not send if
+	// nothing happens, even if we end up re-rendering
+	Vector m_LastLPreviewCameraPos;
+	float m_fLastLPreviewAngles[3];						// y,p,r
+	float m_fLastLPreviewZoom;
+	int m_nLastLPreviewWidth;
+	int m_nLastLPreviewHeight;
+
+	Vector4D m_FrustumPlanes[6];		// Plane normals and constants for the current view frustum.
+	
+	MatWinData_t m_WinData;				// Defines our render window parameters.
+	PickInfo_t m_Pick;					// Contains information used when rendering in pick mode.
+	RenderStateInfo_t m_RenderState;	// Render state set via RenderEnable.
+
+	bool m_bDroppedCamera;				// Whether we have dropped the camera for debugging.
+	bool m_DeferRendering;				// Used when we want to sort lovely opaque objects
+	bool m_TranslucentSortRendering;	// Used when we want to sort translucent objects
+	CCamera *m_pDropCamera;				// Dropped camera to use for debugging.
+
+	CUtlPriorityQueue<TranslucentObjects_t> m_TranslucentRenderObjects;				// List of objects to render after all the other objects.
+
+	IMaterial* m_pVertexColor[2];		// for selecting actual textures
+
+	bool m_bLightingPreview;
+
+	// for debugging... render the view frustum
+#ifdef _DEBUG
+	Vector m_FrustumRenderPoint[8];
+	bool m_bRenderFrustum;
+	bool m_bRecomputeFrustumRenderGeometry;
+#endif
+};
+
+#endif // RENDER3DGL_H