diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index d2c6383e2..a7176bae2 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -981,8 +981,8 @@ int32_t renderDrawRoomsQ16(int32_t daposx, int32_t daposy, int32_t daposz,
     else
     {
         vec3_t pos = { daposx, daposy, daposz };
-        if (!testnewinterface) render_drawrooms_(pos, globalcursectnum, daang, dahoriz, rollang, r_fov, false, false);
-        else render_drawrooms(pos, globalcursectnum, daang, dahoriz, rollang, false, false);
+        //if (!testnewinterface) render_drawrooms_(pos, globalcursectnum, daang, dahoriz, rollang, r_fov, false, false);
+        /*else*/ render_drawrooms(pos, globalcursectnum, daang, dahoriz, rollang, false, false);
     }
 
     return inpreparemirror;
diff --git a/source/build/src/voxmodel.cpp b/source/build/src/voxmodel.cpp
index 5aea13d1c..f234a34f7 100644
--- a/source/build/src/voxmodel.cpp
+++ b/source/build/src/voxmodel.cpp
@@ -190,7 +190,6 @@ int32_t polymost_voxdraw(voxmodel_t* m, tspriteptr_t const tspr)
 		GLInterface.SetDepthFunc(DF_Less);
 	}
 	GLInterface.SetIdentityMatrix(Matrix_Model);
-	GLInterface.SetFadeDisable(false);
     return 1;
 }
 
diff --git a/source/core/rendering/hw_entrypoint.cpp b/source/core/rendering/hw_entrypoint.cpp
index ce3c8e765..da7a7a3bc 100644
--- a/source/core/rendering/hw_entrypoint.cpp
+++ b/source/core/rendering/hw_entrypoint.cpp
@@ -60,6 +60,10 @@ EXTERN_CVAR(Bool, cl_capfps)
 bool NoInterpolateView;
 
 
+PalEntry GlobalMapFog;
+float GlobalFogDensity;
+
+
 #if 0
 void CollectLights(FLevelLocals* Level)
 {
@@ -267,7 +271,6 @@ static void CheckTimer(FRenderState &state, uint64_t ShaderStartTime)
 
 void render_drawrooms(vec3_t& position, int sectnum, fixed_t q16angle, fixed_t q16horizon, float rollang, bool mirror, bool planemirror)
 {
-	int retsec = 0;
 	auto RenderState = screen->RenderState();
 	RenderState->SetVertexBuffer(screen->mVertexData);
 	screen->mVertexData->Reset();
@@ -311,7 +314,7 @@ void render_drawrooms(vec3_t& position, int sectnum, fixed_t q16angle, fixed_t q
 
 	// now render the main view
 	float fovratio;
-	float ratio = ActiveRatio(windowxy2.x - windowxy1.x + 1, windowxy2.y - windowxy1.y);
+	float ratio = ActiveRatio(windowxy2.x - windowxy1.x + 1, windowxy2.y - windowxy1.y + 1);
 	if (ratio >= 1.33f)
 	{
 		fovratio = 1.33f;
diff --git a/source/core/rendering/scene/hw_bunchdrawer.cpp b/source/core/rendering/scene/hw_bunchdrawer.cpp
index 3781c2790..6c40c3217 100644
--- a/source/core/rendering/scene/hw_bunchdrawer.cpp
+++ b/source/core/rendering/scene/hw_bunchdrawer.cpp
@@ -47,7 +47,7 @@
 //
 //==========================================================================
 
-void BunchDrawer::Init(FDrawInfo *_di, Clipper* c, vec2_t& view)
+void BunchDrawer::Init(HWDrawInfo *_di, Clipper* c, vec2_t& view)
 {
 	di = _di;
 	clipper = c;
@@ -230,7 +230,7 @@ void BunchDrawer::ProcessBunch(int bnch)
 
 				HWWall hwwall;
 				//Printf("Rendering wall %d\n", i);
-				hwwall.Process(nullptr, &wall[i], &sector[bunch->sectnum], wall[i].nextsector<0? nullptr : &sector[wall[i].nextsector]);
+				hwwall.Process(di, &wall[i], &sector[bunch->sectnum], wall[i].nextsector<0? nullptr : &sector[wall[i].nextsector]);
 				rendered_lines++;
 
 				SetupWall.Unclock();
diff --git a/source/core/rendering/scene/hw_bunchdrawer.h b/source/core/rendering/scene/hw_bunchdrawer.h
index f1a40e359..9cff89973 100644
--- a/source/core/rendering/scene/hw_bunchdrawer.h
+++ b/source/core/rendering/scene/hw_bunchdrawer.h
@@ -3,7 +3,7 @@
 #include "tarray.h"
 #include "basics.h"
 
-class FDrawInfo;
+struct HWDrawInfo;
 class Clipper;
 
 struct FBunch
@@ -17,7 +17,7 @@ struct FBunch
 
 class BunchDrawer
 {
-	FDrawInfo *di;
+	HWDrawInfo *di;
     Clipper *clipper;
     int LastBunch;
     int StartTime;
@@ -49,6 +49,6 @@ private:
     void ProcessSector(int sectnum);
 
 public:
-    void Init(FDrawInfo* _di, Clipper* c, vec2_t& view);
+    void Init(HWDrawInfo* _di, Clipper* c, vec2_t& view);
     void RenderScene(int viewsector);
 };
diff --git a/source/core/rendering/scene/hw_drawinfo.cpp b/source/core/rendering/scene/hw_drawinfo.cpp
index e99897852..34cc77f95 100644
--- a/source/core/rendering/scene/hw_drawinfo.cpp
+++ b/source/core/rendering/scene/hw_drawinfo.cpp
@@ -38,6 +38,7 @@
 #include "hw_vrmodes.h"
 #include "hw_clipper.h"
 #include "v_draw.h"
+#include "gamecvars.h"
 
 EXTERN_CVAR(Float, r_visibility)
 CVAR(Bool, gl_bandedswlight, false, CVAR_ARCHIVE)
@@ -136,7 +137,7 @@ void HWDrawInfo::StartScene(FRenderViewpoint &parentvp, HWViewpointUniforms *uni
 		VPUniforms.mViewMatrix.loadIdentity();
 		VPUniforms.mNormalViewMatrix.loadIdentity();
 		//VPUniforms.mViewHeight = viewheight;
-		VPUniforms.mGlobVis = 1 / 64.f;
+		VPUniforms.mGlobVis = (2 / 65536.f) * g_visibility / r_ambientlight;
 		VPUniforms.mPalLightLevels = numshades | (static_cast<int>(gl_fogmode) << 8) | (5 << 16);
 
 		VPUniforms.mClipLine.X = -10000000.0f;
@@ -184,15 +185,9 @@ HWDrawInfo *HWDrawInfo::EndDrawInfo()
 
 void HWDrawInfo::ClearBuffers()
 {
-	HandledSubsectors.Clear();
 	spriteindex = 0;
-
-	sector_renderflags.Resize(numsectors);
-	memset(&sector_renderflags[0], 0, numsectors * sizeof(sector_renderflags[0]));
-
 	Decals[0].Clear();
 	Decals[1].Clear();
-
 	mClipPortal = nullptr;
 	mCurrentPortal = nullptr;
 }
@@ -296,7 +291,7 @@ HWDecal* HWDrawInfo::AddDecal(bool onmirror)
 
 void HWDrawInfo::CreateScene()
 {
-	const auto &vp = Viewpoint;
+	const auto& vp = Viewpoint;
 
 	angle_t a1 = FrustumAngle();
 	mClipper->SafeAddClipRangeRealAngles(vp.RotAngle + a1, vp.RotAngle - a1);
@@ -312,7 +307,9 @@ void HWDrawInfo::CreateScene()
 	screen->mVertexData->Map();
 	screen->mLights->Map();
 
-	//RenderBSP(Level->HeadNode(), drawpsprites);
+	vec2_t view = { int(vp.Pos.X * 16), int(vp.Pos.Y * -16) };
+	mDrawer.Init(this, mClipper, view);
+	mDrawer.RenderScene(vp.SectNum);
 
 	// And now the crappy hacks that have to be done to avoid rendering anomalies.
 	// These cannot be multithreaded when the time comes because all these depend
diff --git a/source/core/rendering/scene/hw_drawinfo.h b/source/core/rendering/scene/hw_drawinfo.h
index ac7eda6a0..c86e908dd 100644
--- a/source/core/rendering/scene/hw_drawinfo.h
+++ b/source/core/rendering/scene/hw_drawinfo.h
@@ -105,10 +105,6 @@ struct HWDrawInfo
 	TArray<HWPortal *> Portals;
 	TArray<HWDecal *> Decals[2];	// the second slot is for mirrors which get rendered in a separate pass.
 
-	TArray<sectortype *> HandledSubsectors;
-
-	TArray<uint8_t> sector_renderflags;
-
 	// This is needed by the BSP traverser.
 	fixed_t viewx, viewy;	// since the nodes are still fixed point, keeping the view position  also fixed point for node traversal is faster.
 	bool multithread;
@@ -128,12 +124,6 @@ private:
 	//void RenderThings(sectortype * sub, sectortype * sector);
 	//void RenderParticles(sectortype *sub, sectortype *front);
 	void SetColor(FRenderState &state, int sectorlightlevel, int rellight, bool fullbright, const FColormap &cm, float alpha, bool weapon = false);
-	void SetFog(FRenderState &state, int lightlevel, int rellight, bool fullbright, const FColormap *cmap, bool isadditive);
-	void SetShaderLight(FRenderState &state, float level, float olight);
-	int CalcLightLevel(int lightlevel, int rellight, bool weapon, int blendfactor);
-	PalEntry CalcLightColor(int light, PalEntry pe, int blendfactor);
-	float GetFogDensity(int lightlevel, PalEntry fogcolor, int sectorfogdensity, int blendfactor);
-	bool CheckFog(sectortype *frontsector, sectortype *backsector);
 public:
 
 	void SetCameraPos(const DVector3 &pos)
diff --git a/source/core/rendering/scene/hw_drawlistadd.cpp b/source/core/rendering/scene/hw_drawlistadd.cpp
index 2b3b3f0ec..50473b49c 100644
--- a/source/core/rendering/scene/hw_drawlistadd.cpp
+++ b/source/core/rendering/scene/hw_drawlistadd.cpp
@@ -40,7 +40,6 @@ EXTERN_CVAR(Bool, gl_seamless)
 
 void HWDrawInfo::AddWall(HWWall *wall)
 {
-#if 0
 	if (wall->flags & HWWall::HWF_TRANSLUCENT)
 	{
 		auto newwall = drawlists[GLDL_TRANSLUCENT].NewWall();
@@ -48,7 +47,7 @@ void HWDrawInfo::AddWall(HWWall *wall)
 	}
 	else
 	{
-		bool masked = HWWall::passflag[wall->type] == 1 ? false : (wall->texture && wall->texture->isMasked());
+		bool masked = wall->type != RENDERWALL_M2S ? false : (wall->texture && wall->texture->isMasked());
 		int list;
 
 		if (wall->flags & HWWall::HWF_SKYHACK && wall->type == RENDERWALL_M2S)
@@ -62,7 +61,6 @@ void HWDrawInfo::AddWall(HWWall *wall)
 		auto newwall = drawlists[list].NewWall();
 		*newwall = *wall;
 	}
-#endif
 }
 
 //==========================================================================
diff --git a/source/core/rendering/scene/hw_drawstructs.h b/source/core/rendering/scene/hw_drawstructs.h
index 56fe42c85..4bf17ce2c 100644
--- a/source/core/rendering/scene/hw_drawstructs.h
+++ b/source/core/rendering/scene/hw_drawstructs.h
@@ -154,7 +154,9 @@ public:
 	
 	float ViewDistance;
 	float visibility;
-	short shade, palette, floorpal;
+	short shade, palette;
+
+	PalEntry fade;
 
 	uint16_t flags;
 	uint8_t type;
diff --git a/source/core/rendering/scene/hw_walls.cpp b/source/core/rendering/scene/hw_walls.cpp
index a5550c86c..bffd46d75 100644
--- a/source/core/rendering/scene/hw_walls.cpp
+++ b/source/core/rendering/scene/hw_walls.cpp
@@ -26,8 +26,7 @@
 #include "hw_cvars.h"
 #include "hw_clock.h"
 //#include "hw_lighting.h"
-//#include "hwrenderer/scene/hw_drawinfo.h"
-//#include "hwrenderer/scene/hw_drawstructs.h"
+#include "hw_drawinfo.h"
 //#include "hwrenderer/scene/hw_portal.h"
 #include "hw_lightbuffer.h"
 #include "hw_renderstate.h"
@@ -40,6 +39,8 @@
 #include "flatvertices.h"
 #include "glbackend/glbackend.h"
 
+extern PalEntry GlobalMapFog;
+extern float GlobalFogDensity;
 
 //==========================================================================
 //
@@ -171,12 +172,10 @@ void HWWall::RenderMirrorSurface(HWDrawInfo *di, FRenderState &state)
 
 void HWWall::RenderTexturedWall(HWDrawInfo *di, FRenderState &state, int rflags)
 {
-#if 0
-	int tmode = state.GetTextureMode();
+	//int tmode = state.GetTextureMode();
 
-	state.SetMaterial(texture, UF_Texture, 0, flags & 3, 0, -1);
+	state.SetMaterial(texture, UF_Texture, 0, 0/*flags & 3*/, TRANSLATION(Translation_Remap + curbasepal, palette), -1);
 
-	
 	int32_t size = xs_CRoundToInt(texture->GetDisplayHeight());
 	int32_t size2;
 	for (size2 = 1; size2 < size; size2 += size2) {}
@@ -188,13 +187,48 @@ void HWWall::RenderTexturedWall(HWDrawInfo *di, FRenderState &state, int rflags)
 		state.SetNpotEmulation((1.f * size2) / size, xOffset);
 	}
 
-
 	float absalpha = fabsf(alpha);
-	if (type != RENDERWALL_M2SNF) di->SetFog(state, lightlevel, rel, di->isFullbrightScene(), &Colormap, RenderStyle == STYLE_Add);
-	di->SetColor(state, lightlevel, rel, di->isFullbrightScene(), Colormap, absalpha);
+
+	// Fog must be done before the texture so that the texture selector can override it.
+	bool foggy = (GlobalMapFog || (fade & 0xffffff));
+	auto ShadeDiv = lookups.tables[palette].ShadeFactor;
+	// Disable brightmaps if non-black fog is used.
+	if (ShadeDiv >= 1 / 1000.f && foggy)
+	{
+		state.EnableFog(1);
+		float density = GlobalMapFog ? GlobalFogDensity : 350.f - Scale(numshades - shade, 150, numshades);
+		state.SetFog((GlobalMapFog) ? GlobalMapFog : fade, density);
+		state.SetSoftLightLevel(255);
+		state.SetLightParms(128.f, 1 / 1000.f);
+	}
+	else
+	{
+		state.EnableFog(0);
+		state.SetFog(0, 0);
+		state.SetSoftLightLevel(ShadeDiv >= 1 / 1000.f ? 255 - Scale(shade, 255, numshades) : 255);
+		state.SetLightParms(visibility, ShadeDiv / (numshades - 2));
+	}
+
+	// The shade rgb from the tint is ignored here.
+	state.SetColor(PalEntry(255, globalr, globalg, globalb));
+
+	int h = texture->GetTexelHeight();
+	int h2 = 1 << sizeToBits(h);
+	if (h2 < h) h2 *= 2;
+	if (h != h2)
+	{
+		float xOffset = 1.f / texture->GetTexelWidth();
+		state.SetNpotEmulation(float(h2) / h, xOffset);
+	}
+	else
+	{
+		state.SetNpotEmulation(0.f, 0.f);
+	}
+
 	RenderWall(di, state, rflags);
 
 	state.SetNpotEmulation(0.f, 0.f);
+	/* none of these functions is in use.
 	state.SetObjectColor(0xffffffff);
 	state.SetObjectColor2(0);
 	state.SetAddColor(0);
@@ -202,7 +236,7 @@ void HWWall::RenderTexturedWall(HWDrawInfo *di, FRenderState &state, int rflags)
 	state.EnableGlow(false);
 	state.EnableGradient(false);
 	state.ApplyTextureManipulation(nullptr);
-#endif
+	*/
 }
 
 //==========================================================================
@@ -229,16 +263,16 @@ void HWWall::RenderTranslucentWall(HWDrawInfo *di, FRenderState &state)
 //==========================================================================
 void HWWall::DrawWall(HWDrawInfo *di, FRenderState &state, bool translucent)
 {
-	/*
 	if (screen->BuffersArePersistent())
 	{
+		/*
 		if (di->Level->HasDynamicLights && !di->isFullbrightScene() && texture != nullptr)
 		{
 			SetupLights(di, lightdata);
 		}
+		*/
 		MakeVertices(di, !!(flags & HWWall::HWF_TRANSLUCENT));
 	}
-	*/
 
 	state.SetNormal(glseg.Normal());
 	if (!translucent)
@@ -379,16 +413,18 @@ void HWWall::PutWall(HWDrawInfo *di, bool translucent)
 		//ViewDistance = (di->Viewpoint.Pos - (seg->linedef->v1->fPos() + seg->linedef->Delta() / 2)).XY().LengthSquared();
 	}
 	
-	/*
 	if (!screen->BuffersArePersistent())
 	{
+		/*
 		if (di->Level->HasDynamicLights && !di->isFullbrightScene() && texture != nullptr)
 		{
 			SetupLights(di, lightdata);
 		}
+		*/
 		MakeVertices(di, translucent);
 	}
 
+	/*
 	bool hasDecals = type != RENDERWALL_M2S && seg->sidedef->AttachedDecals;
 	if (hasDecals)
 	{
@@ -404,56 +440,7 @@ void HWWall::PutWall(HWDrawInfo *di, bool translucent)
 	}
 	*/
 
-#if 0
 	di->AddWall(this);
-#else
-	// route it through the GLInterface for now for easier testing
-	int palid = TRANSLATION(Translation_Remap + curbasepal, globalpal);
-	GLInterface.SetFade(globalfloorpal);
-	GLInterface.SetTexture(texture, TRANSLATION(Translation_Remap + curbasepal, palette), 0);
-
-	GLInterface.SetShade(shade, numshades);
-
-	int h = texture->GetTexelHeight();
-	int h2 = 1 << sizeToBits(h);
-	if (h2 < h) h2 *= 2;
-	if (h != h2)
-	{
-		float xOffset = 1.f / texture->GetTexelWidth();
-		GLInterface.SetNpotEmulation(float(h2) / h, xOffset);
-	}
-	else
-	{
-		GLInterface.SetNpotEmulation(0.f, 0.f);
-	}
-	GLInterface.SetTextureMode(TM_OPAQUE);
-	GLInterface.SetVisibility(visibility);
-
-	// The shade rgb from the tint is ignored here.
-	float pc[4];
-	pc[0] = (float)globalr * (1.f / 255.f);
-	pc[1] = (float)globalg * (1.f / 255.f);
-	pc[2] = (float)globalb * (1.f / 255.f);
-	pc[3] = alpha;
-	GLInterface.SetColor(pc[0], pc[1], pc[2], pc[3]);
-
-	auto data = screen->mVertexData->AllocVertices(4);
-	auto vt = data.first;
-	vt[0].SetTexCoord(tcs[LOLFT].u, tcs[LOLFT].v);
-	vt[0].SetVertex(glseg.x1, zbottom[0], glseg.y1);
-	vt[1].SetTexCoord(tcs[UPLFT].u, tcs[UPLFT].v);
-	vt[1].SetVertex(glseg.x1, ztop[0], glseg.y1);
-	vt[2].SetTexCoord(tcs[UPRGT].u, tcs[UPRGT].v);
-	vt[2].SetVertex(glseg.x2, ztop[1], glseg.y2);
-	vt[3].SetTexCoord(tcs[LORGT].u, tcs[LORGT].v);
-	vt[3].SetVertex(glseg.x2, zbottom[1], glseg.y2);
-
-	GLInterface.Draw(DT_TriangleFan, data.second, 4);
-
-	GLInterface.SetNpotEmulation(0.f, 0.f);
-	GLInterface.SetTextureMode(TM_NORMAL);
-
-#endif
 	// make sure that following parts of the same linedef do not get this one's vertex and lighting info.
 	vertcount = 0;	
 	dynlightindex = -1;
@@ -1000,7 +987,7 @@ void HWWall::Process(HWDrawInfo *di, walltype *wal, sectortype* frontsector, sec
 	dynlightindex = -1;
 	shade = wal->shade;
 	palette = wal->pal;
-	floorpal = frontsector->floorpal;
+	fade = lookups.getFade(frontsector->floorpal);	// fog is per sector.
 	visibility = sectorVisibility(frontsector);
 
 	alpha = 1.0f;
diff --git a/source/games/duke/src/render.cpp b/source/games/duke/src/render.cpp
index 321e2bc31..c3c3101cb 100644
--- a/source/games/duke/src/render.cpp
+++ b/source/games/duke/src/render.cpp
@@ -34,6 +34,10 @@ Modifications for JonoF's port by Jonathon Fowler (jf@jonof.id.au)
 #include "dukeactor.h"
 #include "interpolate.h"
 
+// temporary hack to pass along RRRA's global fog. Needs to be done better later.
+extern PalEntry GlobalMapFog;
+extern float GlobalFogDensity;
+
 
 BEGIN_DUKE_NS
 
@@ -491,6 +495,8 @@ void displayrooms(int snum, double smoothratio)
 	sect = p->cursectnum;
 	if (sect < 0 || sect >= MAXSECTORS) return;
 
+	GlobalMapFog = fogactive ? 0x999999 : 0;
+	GlobalFogDensity = fogactive ? 350.f : 0.f;
 	GLInterface.SetMapFog(fogactive != 0);
 	DoInterpolations(smoothratio / 65536.);
 
diff --git a/source/glbackend/glbackend.h b/source/glbackend/glbackend.h
index 518a7503e..ced1e8885 100644
--- a/source/glbackend/glbackend.h
+++ b/source/glbackend/glbackend.h
@@ -287,12 +287,6 @@ public:
 		renderState.NPOTEmulation.X = xOffset;
 	}
 
-	void SetFadeDisable(bool yes)
-	{
-		if (yes) renderState.Flags |= RF_FogDisabled;
-		else renderState.Flags &= ~RF_FogDisabled;
-	}
-
 	// Hack...
 	bool useMapFog = false;