diff --git a/src/gl/data/gl_viewpointbuffer.cpp b/src/gl/data/gl_viewpointbuffer.cpp
index eb4d8c92e..611db9e40 100644
--- a/src/gl/data/gl_viewpointbuffer.cpp
+++ b/src/gl/data/gl_viewpointbuffer.cpp
@@ -144,7 +144,6 @@ void GLViewpointBuffer::Set2D(int width, int height)
 		HWViewpointUniforms matrices;
 		matrices.SetDefaults();
 		matrices.mProjectionMatrix.ortho(0, width, height, 0, -1.0f, 1.0f);
-		matrices.mFogEnabled = 3;
 		matrices.CalcDependencies();
 		Map();
 		memcpy(mBufferPointer, &matrices, sizeof(matrices));
diff --git a/src/gl/renderer/gl_renderstate.cpp b/src/gl/renderer/gl_renderstate.cpp
index a5de63896..e585296f6 100644
--- a/src/gl/renderer/gl_renderstate.cpp
+++ b/src/gl/renderer/gl_renderstate.cpp
@@ -119,7 +119,7 @@ bool FRenderState::ApplyShader()
 	static uint64_t firstFrame = 0;
 	// if firstFrame is not yet initialized, initialize it to current time
 	// if we're going to overflow a float (after ~4.6 hours, or 24 bits), re-init to regain precision
-	if ((firstFrame == 0) || (screen->FrameTime - firstFrame >= 1 << 24) || level.ShaderStartTime >= firstFrame)
+	if ((firstFrame == 0) || (screen->FrameTime - firstFrame >= 1<<24) || level.ShaderStartTime >= firstFrame)
 		firstFrame = screen->FrameTime;
 
 	static const float nulvec[] = { 0.f, 0.f, 0.f, 0.f };
@@ -133,15 +133,31 @@ bool FRenderState::ApplyShader()
 		activeShader->Bind();
 	}
 
+	int fogset = 0;
+
+	if (mFogEnabled)
+	{
+		if (mFogEnabled == 2)
+		{
+			fogset = -3;	// 2D rendering with 'foggy' overlay.
+		}
+		else if ((mFogColor & 0xffffff) == 0)
+		{
+			fogset = gl_fogmode;
+		}
+		else
+		{
+			fogset = -gl_fogmode;
+		}
+	}
+
 	glVertexAttrib4fv(VATTR_COLOR, mColor.vec);
 	glVertexAttrib4fv(VATTR_NORMAL, mNormal.vec);
 
 	activeShader->muDesaturation.Set(mDesaturation / 255.f);
+	activeShader->muFogEnabled.Set(fogset);
 	activeShader->muTextureMode.Set(mTextureMode == TM_MODULATE && mTempTM == TM_OPAQUE ? TM_OPAQUE : mTextureMode);
-	float fds = mLightParms[2];
-	if (!mFogEnabled) mLightParms[2] = 0;
 	activeShader->muLightParms.Set(mLightParms);
-	mLightParms[2] = fds;
 	activeShader->muFogColor.Set(mFogColor);
 	activeShader->muObjectColor.Set(mObjectColor);
 	activeShader->muObjectColor2.Set(mObjectColor2);
diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 3044d4bd6..1a83521f1 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -375,7 +375,6 @@ void FDrawInfo::DrawEndScene2D(sector_t * viewsector)
 	HWViewpointUniforms vp = VPUniforms;
 	vp.mViewMatrix.loadIdentity();
 	vp.mProjectionMatrix = vrmode->GetHUDSpriteProjection();
-	vp.mFogEnabled = 0;
 	GLRenderer->mViewpoints->SetViewpoint(&vp);
 	glDisable(GL_DEPTH_TEST);
 	glDisable(GL_MULTISAMPLE);
diff --git a/src/gl/shaders/gl_shader.cpp b/src/gl/shaders/gl_shader.cpp
index 19d30ed47..564365341 100644
--- a/src/gl/shaders/gl_shader.cpp
+++ b/src/gl/shaders/gl_shader.cpp
@@ -68,8 +68,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 			int uViewHeight;		// Software fuzz scaling
 			float uClipHeight;
 			float uClipHeightDirection;
-			int uFogEnabled;
-
+			int uShadowmapFilter;
 		};
 	)";
 	
@@ -100,6 +99,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 	i_data += "#define uFogDensity uLightAttr.b\n";
 	i_data += "#define uLightFactor uLightAttr.g\n";
 	i_data += "#define uLightDist uLightAttr.r\n";
+	i_data += "uniform int uFogEnabled;\n";
 
 	// dynamic lights
 	i_data += "uniform int uLightIndex;\n";
@@ -331,6 +331,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 
 
 	muDesaturation.Init(hShader, "uDesaturationFactor");
+	muFogEnabled.Init(hShader, "uFogEnabled");
 	muTextureMode.Init(hShader, "uTextureMode");
 	muLightParms.Init(hShader, "uLightAttr");
 	muClipSplit.Init(hShader, "uClipSplit");
diff --git a/src/gl/shaders/gl_shader.h b/src/gl/shaders/gl_shader.h
index 2d1d28f76..46ba3c793 100644
--- a/src/gl/shaders/gl_shader.h
+++ b/src/gl/shaders/gl_shader.h
@@ -242,6 +242,7 @@ class FShader
 	FName mName;
 
 	FBufferedUniform1f muDesaturation;
+	FBufferedUniform1i muFogEnabled;
 	FBufferedUniform1i muTextureMode;
 	FBufferedUniform4f muLightParms;
 	FBufferedUniform2f muClipSplit;
diff --git a/src/hwrenderer/scene/hw_drawinfo.cpp b/src/hwrenderer/scene/hw_drawinfo.cpp
index bf04aef6c..c72f510ae 100644
--- a/src/hwrenderer/scene/hw_drawinfo.cpp
+++ b/src/hwrenderer/scene/hw_drawinfo.cpp
@@ -280,6 +280,6 @@ void HWViewpointUniforms::SetDefaults()
 	mGlobVis = (float)R_GetGlobVis(r_viewwindow, r_visibility) / 32.f;
 	mPalLightLevels = static_cast<int>(gl_bandedswlight) | (static_cast<int>(gl_fogmode) << 8);
 	mClipLine.X = -10000000.0f;
-	mFogEnabled = gl_fogmode;
+	mShadowmapFilter = gl_shadowmap_filter;
 
 }
diff --git a/src/hwrenderer/scene/hw_viewpointuniforms.h b/src/hwrenderer/scene/hw_viewpointuniforms.h
index 675ee71eb..1bd57faa0 100644
--- a/src/hwrenderer/scene/hw_viewpointuniforms.h
+++ b/src/hwrenderer/scene/hw_viewpointuniforms.h
@@ -16,7 +16,7 @@ struct HWViewpointUniforms
 	int mViewHeight = 0;
 	float mClipHeight = 0.f;
 	float mClipHeightDirection = 0.f;
-	int mFogEnabled = 0;
+	int mShadowmapFilter = 1;
 
 	void CalcDependencies()
 	{
diff --git a/src/hwrenderer/utility/hw_cvars.cpp b/src/hwrenderer/utility/hw_cvars.cpp
index c849e62d5..f0a0f8c83 100644
--- a/src/hwrenderer/utility/hw_cvars.cpp
+++ b/src/hwrenderer/utility/hw_cvars.cpp
@@ -132,3 +132,8 @@ CUSTOM_CVAR(Int, gl_fuzztype, 0, CVAR_ARCHIVE)
 {
 	if (self < 0 || self > 8) self = 0;
 }
+
+CUSTOM_CVAR(Int, gl_shadowmap_filter, 1, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
+{
+	if (self < 0 || self > 8) self = 1;
+}
diff --git a/src/hwrenderer/utility/hw_cvars.h b/src/hwrenderer/utility/hw_cvars.h
index 440265930..8e4ebbca8 100644
--- a/src/hwrenderer/utility/hw_cvars.h
+++ b/src/hwrenderer/utility/hw_cvars.h
@@ -69,3 +69,5 @@ EXTERN_CVAR(Bool, gl_billboard_faces_camera)
 EXTERN_CVAR(Bool, gl_billboard_particles)
 EXTERN_CVAR(Int, gl_enhanced_nv_stealth)
 EXTERN_CVAR(Int, gl_fuzztype)
+
+EXTERN_CVAR(Int, gl_shadowmap_filter)
\ No newline at end of file
diff --git a/wadsrc/static/language.enu b/wadsrc/static/language.enu
index 5b74c775e..38a1962e8 100644
--- a/wadsrc/static/language.enu
+++ b/wadsrc/static/language.enu
@@ -2792,6 +2792,7 @@ GLLIGHTMNU_LIGHTSPRITES				= "Lights affect sprites";
 GLLIGHTMNU_LIGHTPARTICLES			= "Lights affect particles";
 GLLIGHTMNU_LIGHTSHADOWMAP			= "Light shadowmaps";
 GLLIGHTMNU_LIGHTSHADOWMAPQUALITY	= "Shadowmap quality";
+GLLIGHTMNU_LIGHTSHADOWMAPFILTER		= "Shadowmap filter";
 
 // OpenGL Preferences
 GLPREFMNU_TITLE 				= "OPENGL PREFERENCES";
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index a51bbdd61..0bd45a7d7 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -2256,6 +2256,13 @@ OptionValue ShadowMapQuality
 	1024, "1024"
 }
 
+OptionValue ShadowMapFilter
+{
+	0, "$OPTVAL_LINEAR"
+	1, "PCF"
+}
+
+
 OptionMenu "GLTextureGLOptions" protected
 {
 	Title "$GLTEXMNU_TITLE"
@@ -2293,6 +2300,7 @@ OptionMenu "GLLightOptions" protected
 	Option "$GLLIGHTMNU_LIGHTPARTICLES",		gl_light_particles,		"YesNo"
 	Option "$GLLIGHTMNU_LIGHTSHADOWMAP",		gl_light_shadowmap,		"YesNo"
 	Option "$GLLIGHTMNU_LIGHTSHADOWMAPQUALITY", gl_shadowmap_quality,	"ShadowMapQuality"
+	Option "$GLLIGHTMNU_LIGHTSHADOWMAPFILTER", 	gl_shadowmap_filter,	"ShadowMapFilter"
 }
 
 OptionMenu "OpenGLOptions" protected
diff --git a/wadsrc/static/shaders/glsl/fogboundary.fp b/wadsrc/static/shaders/glsl/fogboundary.fp
index 81880f984..9dcdb4850 100644
--- a/wadsrc/static/shaders/glsl/fogboundary.fp
+++ b/wadsrc/static/shaders/glsl/fogboundary.fp
@@ -15,7 +15,7 @@ void main()
 	//
 	// calculate fog factor
 	//
-	if (uFogEnabled == 1) 
+	if (uFogEnabled == -1) 
 	{
 		fogdist = pixelpos.w;
 	}
diff --git a/wadsrc/static/shaders/glsl/main.fp b/wadsrc/static/shaders/glsl/main.fp
index 5848058f3..c78bb0e02 100644
--- a/wadsrc/static/shaders/glsl/main.fp
+++ b/wadsrc/static/shaders/glsl/main.fp
@@ -215,12 +215,6 @@ float sampleShadowmapLinear(vec2 dir, float v)
 //
 //===========================================================================
 
-#define PCF_FILTER_STEP_COUNT 3
-#define PCF_COUNT (PCF_FILTER_STEP_COUNT * 2 + 1)
-
-// #define USE_LINEAR_SHADOW_FILTER
-#define USE_PCF_SHADOW_FILTER 1
-
 float shadowmapAttenuation(vec4 lightpos, float shadowIndex)
 {
 	if (shadowIndex >= 1024.0)
@@ -235,23 +229,29 @@ float shadowmapAttenuation(vec4 lightpos, float shadowIndex)
 
 	vec2 dir = ray / length;
 
-#if defined(USE_LINEAR_SHADOW_FILTER)
-	ray -= dir * 6.0; // Shadow acne margin
-	return sampleShadowmapLinear(ray, v);
-#elif defined(USE_PCF_SHADOW_FILTER)
-	ray -= dir * 2.0; // Shadow acne margin
-	dir = dir * min(length / 50.0, 1.0); // avoid sampling behind light
-
-	vec2 normal = vec2(-dir.y, dir.x);
-	vec2 bias = dir * 10.0;
-
-	float sum = 0.0;
-	for (float x = -PCF_FILTER_STEP_COUNT; x <= PCF_FILTER_STEP_COUNT; x++)
+	if (uShadowmapFilter <= 0)
 	{
-		sum += sampleShadowmap(ray + normal * x - bias * abs(x), v);
+		ray -= dir * 2.0; // Shadow acne margin
+		return sampleShadowmapLinear(ray, v);
 	}
-	return sum / PCF_COUNT;
-#else // nearest shadow filter
+	else
+	{
+		ray -= dir * 2.0; // Shadow acne margin
+		dir = dir * min(length / 50.0, 1.0); // avoid sampling behind light
+
+		vec2 normal = vec2(-dir.y, dir.x);
+		vec2 bias = dir * 10.0;
+
+		float sum = 0.0;
+		float step_count = ((uShadowmapFilter - 1) / 2.);
+		
+		for (float x = -step_count; x <= step_count; x++)
+		{
+			sum += sampleShadowmap(ray + normal * x /*- bias * abs(x)*/, v);
+		}
+		return sum / uShadowmapFilter;
+	}
+#if 0 // nearest shadow filter (not used)
 	ray -= dir * 6.0; // Shadow acne margin
 	return sampleShadowmap(ray, v);
 #endif
@@ -358,7 +358,7 @@ vec4 getLightColor(Material material, float fogdist, float fogfactor)
 		float newlightlevel = 1.0 - R_DoomLightingEquation(uLightLevel);
 		color.rgb *= newlightlevel;
 	}
-	else if (uFogColor.rgb == vec3(0.0))
+	else if (uFogEnabled > 0)
 	{
 		// brightening around the player for light mode 2
 		if (fogdist < uLightDist)
@@ -421,7 +421,7 @@ vec3 AmbientOcclusionColor()
 	//
 	// calculate fog factor
 	//
-	if (uFogEnabled == 1) 
+	if (uFogEnabled == -1) 
 	{
 		fogdist = pixelpos.w;
 	}
@@ -449,17 +449,17 @@ void main()
 	if (frag.a <= uAlphaThreshold) discard;
 #endif
 
-	if (uFogEnabled != 3)	// check for special 2D 'fog' mode.
+	if (uFogEnabled != -3)	// check for special 2D 'fog' mode.
 	{
 		float fogdist = 0.0;
-		float fogfactor = 1.0;
+		float fogfactor = 0.0;
 		
 		//
 		// calculate fog factor
 		//
-		if (uFogEnabled != 0 && uFogDensity != 0)
+		if (uFogEnabled != 0)
 		{
-			if (uFogEnabled == 1) 
+			if (uFogEnabled == 1 || uFogEnabled == -1) 
 			{
 				fogdist = pixelpos.w;
 			}
@@ -476,7 +476,7 @@ void main()
 			//
 			// colored fog
 			//
-			if (uFogColor.rgb != vec3(0.0)) 
+			if (uFogEnabled < 0) 
 			{
 				frag = applyFog(frag, fogfactor);
 			}
@@ -494,7 +494,7 @@ void main()
 			vec4 cm = (uObjectColor + gray * (uObjectColor2 - uObjectColor)) * 2;
 			frag = vec4(clamp(cm.rgb, 0.0, 1.0), frag.a);
 		}
-		frag = frag * ProcessLight(material, vColor);
+			frag = frag * ProcessLight(material, vColor);
 		frag.rgb = frag.rgb + uFogColor.rgb;
 	}
 	FragColor = frag;
diff --git a/wadsrc_lights/static/filter/doom.doom1/gldefs.txt b/wadsrc_lights/static/filter/doom.doom1/gldefs.txt
index 83c30369d..61536f97f 100644
--- a/wadsrc_lights/static/filter/doom.doom1/gldefs.txt
+++ b/wadsrc_lights/static/filter/doom.doom1/gldefs.txt
@@ -384,7 +384,7 @@ object TechLamp
 // Tall red torch
 flickerlight2 BIGREDTORCH
 {
-    color 1.0 0.5 0.2
+    color 0.7 0.35 0.14
     size 90
     secondarySize 99
     interval 0.1
@@ -400,7 +400,7 @@ object RedTorch
 // Tall green torch
 flickerlight2 BIGGREENTORCH
 {
-    color 0.3 1.0 0.3
+    color 0.2 0.7 0.2
     size 90
     secondarySize 99
     interval 0.1
@@ -416,7 +416,7 @@ object GreenTorch
 // Tall blue torch
 flickerlight2 BIGBLUETORCH
 {
-    color 0.3 0.3 1.0
+    color 0.2 0.2 0.7
     size 90
     secondarySize 99
     interval 0.1
@@ -432,7 +432,7 @@ object BlueTorch
 // Small red torch
 flickerlight2 SMALLREDTORCH
 {
-    color 1.0 0.5 0.2
+    color 0.7 0.35 0.14
     size 72
     secondarySize 81
     interval 0.1
@@ -448,7 +448,7 @@ object ShortRedTorch
 // Small green torch
 flickerlight2 SMALLGREENTORCH
 {
-    color 0.3 1.0 0.3
+    color 0.2 0.7 0.2
     size 72
     secondarySize 81
     interval 0.1
@@ -464,7 +464,7 @@ object ShortGreenTorch
 // Small blue torch
 flickerlight2 SMALLBLUETORCH
 {
-    color 0.3 0.3 1.0
+    color 0.2 0.2 0.7
     size 72
     secondarySize 81
     interval 0.1
diff --git a/wadsrc_lights/static/filter/doom.doom2/gldefs.txt b/wadsrc_lights/static/filter/doom.doom2/gldefs.txt
index 83c30369d..61536f97f 100644
--- a/wadsrc_lights/static/filter/doom.doom2/gldefs.txt
+++ b/wadsrc_lights/static/filter/doom.doom2/gldefs.txt
@@ -384,7 +384,7 @@ object TechLamp
 // Tall red torch
 flickerlight2 BIGREDTORCH
 {
-    color 1.0 0.5 0.2
+    color 0.7 0.35 0.14
     size 90
     secondarySize 99
     interval 0.1
@@ -400,7 +400,7 @@ object RedTorch
 // Tall green torch
 flickerlight2 BIGGREENTORCH
 {
-    color 0.3 1.0 0.3
+    color 0.2 0.7 0.2
     size 90
     secondarySize 99
     interval 0.1
@@ -416,7 +416,7 @@ object GreenTorch
 // Tall blue torch
 flickerlight2 BIGBLUETORCH
 {
-    color 0.3 0.3 1.0
+    color 0.2 0.2 0.7
     size 90
     secondarySize 99
     interval 0.1
@@ -432,7 +432,7 @@ object BlueTorch
 // Small red torch
 flickerlight2 SMALLREDTORCH
 {
-    color 1.0 0.5 0.2
+    color 0.7 0.35 0.14
     size 72
     secondarySize 81
     interval 0.1
@@ -448,7 +448,7 @@ object ShortRedTorch
 // Small green torch
 flickerlight2 SMALLGREENTORCH
 {
-    color 0.3 1.0 0.3
+    color 0.2 0.7 0.2
     size 72
     secondarySize 81
     interval 0.1
@@ -464,7 +464,7 @@ object ShortGreenTorch
 // Small blue torch
 flickerlight2 SMALLBLUETORCH
 {
-    color 0.3 0.3 1.0
+    color 0.2 0.2 0.7
     size 72
     secondarySize 81
     interval 0.1