diff --git a/src/r_3dfloors.cpp b/src/r_3dfloors.cpp
index b3e0ed062..fbdc34edc 100644
--- a/src/r_3dfloors.cpp
+++ b/src/r_3dfloors.cpp
@@ -12,7 +12,7 @@
 #include "r_local.h"
 #include "r_bsp.h"
 #include "r_plane.h"
-
+#include "c_cvars.h"
 #include "r_3dfloors.h"
 
 // external variables
@@ -28,6 +28,8 @@ HeightLevel *height_cur = NULL;
 int CurrentMirror = 0;
 int CurrentSkybox = 0;
 
+CVAR(Int, r_3dfloors, true, 0);
+
 // private variables
 int height_max = -1;
 TArray<HeightStack> toplist;
diff --git a/src/r_3dfloors.h b/src/r_3dfloors.h
index d7cf87eeb..f04325349 100644
--- a/src/r_3dfloors.h
+++ b/src/r_3dfloors.h
@@ -37,13 +37,13 @@ enum
 	FAKE3D_FAKECEILING		= 2,	// fake ceiling, mark seg as FAKE
 	FAKE3D_FAKEBACK			= 4,	// R_AddLine with fake backsector, mark seg as FAKE
 	FAKE3D_FAKEMASK			= 7,
+	FAKE3D_CLIPBOTFRONT		= 8,	// use front sector clipping info (bottom)
+	FAKE3D_CLIPTOPFRONT		= 16,	// use front sector clipping info (top)
 
 	// sorting stage:
 	FAKE3D_CLIPBOTTOM		= 1,	// clip bottom
 	FAKE3D_CLIPTOP			= 2,	// clip top
 	FAKE3D_REFRESHCLIP		= 4,	// refresh clip info
-	FAKE3D_DOWN2UP			= 8,	// rendering from down to up (floors)
-	FAKE3D_16				= 16,	// what is this?
 };
 
 extern int fake3D;
@@ -57,6 +57,7 @@ extern HeightLevel *height_top;
 extern HeightLevel *height_cur;
 extern int CurrentMirror;
 extern int CurrentSkybox;
+EXTERN_CVAR(Int, r_3dfloors);
 
 // functions
 void R_3D_DeleteHeights();
diff --git a/src/r_bsp.cpp b/src/r_bsp.cpp
index a69b0170b..49c48804e 100644
--- a/src/r_bsp.cpp
+++ b/src/r_bsp.cpp
@@ -1238,7 +1238,7 @@ void R_Subsector (subsector_t *sub)
 					) : NULL;
 
 	// kg3D - fake planes rendering
-	if (frontsector->e && frontsector->e->XFloor.ffloors.Size())
+	if (r_3dfloors && frontsector->e && frontsector->e->XFloor.ffloors.Size())
 	{
 		backupfp = floorplane;
 		backupcp = ceilingplane;
@@ -1399,7 +1399,7 @@ void R_Subsector (subsector_t *sub)
 		if (!outersubsector || line->sidedef == NULL || !(line->sidedef->Flags & WALLF_POLYOBJ))
 		{
 			// kg3D - fake planes bounding calculation
-			if (line->backsector && frontsector->e && line->backsector->e->XFloor.ffloors.Size())
+			if (r_3dfloors && line->backsector && frontsector->e && line->backsector->e->XFloor.ffloors.Size())
 			{
 				backupfp = floorplane;
 				backupcp = ceilingplane;
@@ -1423,11 +1423,11 @@ void R_Subsector (subsector_t *sub)
 					}
 					if (frontsector->CenterFloor() >= backsector->CenterFloor())
 					{
-						fake3D |= FAKE3D_DOWN2UP;
+						fake3D |= FAKE3D_CLIPBOTFRONT;
 					}
 					if (frontsector->CenterCeiling() <= backsector->CenterCeiling())
 					{
-						fake3D |= FAKE3D_16;
+						fake3D |= FAKE3D_CLIPTOPFRONT;
 					}
 					R_AddLine(line); // fake
 				}
@@ -1455,7 +1455,6 @@ void R_Subsector (subsector_t *sub)
 void R_RenderBSPNode (void *node)
 {
 	if (numnodes == 0)
-	{
 		R_Subsector (subsectors);
 		return;
 	}
diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index abe7b8670..e2b0aaafc 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -1614,7 +1614,7 @@ void R_RenderSegLoop ()
 	// kg3D - fake planes clipping
 	if (fake3D & FAKE3D_REFRESHCLIP)
 	{
-		if (fake3D & FAKE3D_DOWN2UP)
+		if (fake3D & FAKE3D_CLIPBOTFRONT)
 		{
 			memcpy (fakeFloor->floorclip+x1, wallbottom+x1, (x2-x1)*sizeof(short));
 		}
@@ -1626,7 +1626,7 @@ void R_RenderSegLoop ()
 			}
 			memcpy (fakeFloor->floorclip+x1, walllower+x1, (x2-x1)*sizeof(short));
 		}
-		if (fake3D & FAKE3D_16)
+		if (fake3D & FAKE3D_CLIPTOPFRONT)
 		{
 			memcpy (fakeFloor->ceilingclip+x1, walltop+x1, (x2-x1)*sizeof(short));
 		}
@@ -2241,7 +2241,7 @@ void R_StoreWallRange (int start, int stop)
 			}
 		}
 
-		if(!ds_p->fake && backsector->e && backsector->e->XFloor.ffloors.Size()) {
+		if(!ds_p->fake && r_3dfloors && backsector->e && backsector->e->XFloor.ffloors.Size()) {
 			for(i = 0; i < (int)backsector->e->XFloor.ffloors.Size(); i++) {
 				F3DFloor *rover = backsector->e->XFloor.ffloors[i];
 				if(rover->flags & FF_RENDERSIDES && (!(rover->flags & FF_INVERTSIDES) || rover->flags & FF_ALLSIDES)) {
@@ -2250,7 +2250,7 @@ void R_StoreWallRange (int start, int stop)
 				}
 			}
 		}
-		if(!ds_p->fake && frontsector->e && frontsector->e->XFloor.ffloors.Size()) {
+		if(!ds_p->fake && r_3dfloors && frontsector->e && frontsector->e->XFloor.ffloors.Size()) {
 			for(i = 0; i < (int)frontsector->e->XFloor.ffloors.Size(); i++) {
 				F3DFloor *rover = frontsector->e->XFloor.ffloors[i];
 				if(rover->flags & FF_RENDERSIDES && (rover->flags & FF_ALLSIDES || rover->flags & FF_INVERTSIDES)) {
@@ -2274,6 +2274,10 @@ void R_StoreWallRange (int start, int stop)
 
 			maskedtexture = true;
 
+			// kg3D - backup for mid and fake walls
+			ds_p->bkup = R_NewOpening(stop - start);
+			memcpy(openings + ds_p->bkup, &ceilingclip[start], sizeof(short)*(stop - start));
+
 			ds_p->bFogBoundary = IsFogBoundary (frontsector, backsector);
 			if (sidedef->GetTexture(side_t::mid).isValid() || ds_p->bFakeBoundary)
 			{
@@ -2369,9 +2373,6 @@ void R_StoreWallRange (int start, int stop)
 	{
 		ds_p->sprtopclip = R_NewOpening (stop - start);
 		memcpy (openings + ds_p->sprtopclip, &ceilingclip[start], sizeof(short)*(stop-start));
-		// kg3D - backup for mid and fake walls
-		ds_p->bkup = R_NewOpening (stop - start);
-		memcpy (openings + ds_p->bkup, &ceilingclip[start], sizeof(short)*(stop-start));
 	}
 
 	if ( ((ds_p->silhouette & SIL_BOTTOM) || maskedtexture) && ds_p->sprbottomclip == -1)
diff --git a/src/r_things.cpp b/src/r_things.cpp
index a94873597..e07cfd25f 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -3410,7 +3410,7 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	vis->cx = tx;
 	vis->gx = particle->x;
 	vis->gy = particle->y;
-	vis->texturemid = particle->z; // kg3D
+	vis->gz = particle->z; // kg3D
 	vis->gzb = y1;
 	vis->gzt = y2;
 	vis->x1 = x1;