diff --git a/src/r_draw.h b/src/r_draw.h
index 643cc6403..47539975f 100644
--- a/src/r_draw.h
+++ b/src/r_draw.h
@@ -104,6 +104,7 @@ enum
 	SPANDRAWFUNC_SPLAT,
 	SPANDRAWFUNC_TRANSSPLAT,
 	SPANDRAWFUNC_TILTEDSPLAT,
+	SPANDRAWFUNC_TILTEDTRANSSPLAT,
 
 	SPANDRAWFUNC_SPRITE,
 	SPANDRAWFUNC_TRANSSPRITE,
diff --git a/src/r_draw_span.cpp b/src/r_draw_span.cpp
index bd7d2cc41..c002f72b7 100644
--- a/src/r_draw_span.cpp
+++ b/src/r_draw_span.cpp
@@ -194,7 +194,7 @@ static void R_DrawSpanTemplate(drawspandata_t* ds)
 		{
 			bit = (((UINT32)yposition >> ds->nflatyshift) & ds->nflatmask) | ((UINT32)xposition >> ds->nflatxshift);
 
-			dest[i] = R_DrawSpanPixel<Type>(ds, dsrc, ds->colormap, bit);
+			dest[i] = R_DrawSpanPixel<Type>(ds, &dsrc[i], ds->colormap, bit);
 
 			xposition += xstep;
 			yposition += ystep;
diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index b85cafbf9..429eeeff8 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -1202,6 +1202,9 @@ void R_DrawSinglePlane(drawspandata_t *ds, visplane_t *pl, boolean allow_paralle
 			case SPANDRAWFUNC_SPLAT:
 				spanfunctype = SPANDRAWFUNC_TILTEDSPLAT;
 				break;
+			case SPANDRAWFUNC_TRANSSPLAT:
+				spanfunctype = SPANDRAWFUNC_TILTEDTRANSSPLAT;
+				break;
 			case SPANDRAWFUNC_FOG:
 				spanfunctype = SPANDRAWFUNC_TILTEDFOG;
 				break;
diff --git a/src/screen.c b/src/screen.c
index 5d223a0fb..8d5691dd2 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -105,6 +105,7 @@ void SCR_SetDrawFuncs(void)
 	spanfuncs[SPANDRAWFUNC_SPLAT] = R_DrawSplat;
 	spanfuncs[SPANDRAWFUNC_TRANSSPLAT] = R_DrawTranslucentSplat;
 	spanfuncs[SPANDRAWFUNC_TILTEDSPLAT] = R_DrawSplat_Tilted;
+	spanfuncs[SPANDRAWFUNC_TILTEDTRANSSPLAT] = R_DrawTranslucentSplat_Tilted;
 	spanfuncs[SPANDRAWFUNC_SPRITE] = R_DrawFloorSprite;
 	spanfuncs[SPANDRAWFUNC_TRANSSPRITE] = R_DrawTranslucentFloorSprite;
 	spanfuncs[SPANDRAWFUNC_TILTEDSPRITE] = R_DrawFloorSprite_Tilted;
@@ -121,6 +122,7 @@ void SCR_SetDrawFuncs(void)
 	spanfuncs_bm[SPANDRAWFUNC_SPLAT] = R_DrawSplat_Brightmap;
 	spanfuncs_bm[SPANDRAWFUNC_TRANSSPLAT] = R_DrawTranslucentSplat_Brightmap;
 	spanfuncs_bm[SPANDRAWFUNC_TILTEDSPLAT] = R_DrawSplat_Tilted_Brightmap;
+	spanfuncs_bm[SPANDRAWFUNC_TILTEDTRANSSPLAT] = R_DrawTranslucentSplat_Tilted_Brightmap;
 	spanfuncs_bm[SPANDRAWFUNC_SPRITE] = R_DrawFloorSprite_Brightmap;
 	spanfuncs_bm[SPANDRAWFUNC_TRANSSPRITE] = R_DrawTranslucentFloorSprite_Brightmap;
 	spanfuncs_bm[SPANDRAWFUNC_TILTEDSPRITE] = R_DrawFloorSprite_Tilted_Brightmap;
@@ -138,6 +140,7 @@ void SCR_SetDrawFuncs(void)
 	spanfuncs_npo2[SPANDRAWFUNC_SPLAT] = R_DrawSplat_NPO2;
 	spanfuncs_npo2[SPANDRAWFUNC_TRANSSPLAT] = R_DrawTranslucentSplat_NPO2;
 	spanfuncs_npo2[SPANDRAWFUNC_TILTEDSPLAT] = R_DrawSplat_Tilted_NPO2;
+	spanfuncs_npo2[SPANDRAWFUNC_TILTEDTRANSSPLAT] = R_DrawTranslucentSplat_Tilted_NPO2;
 	spanfuncs_npo2[SPANDRAWFUNC_SPRITE] = R_DrawFloorSprite_NPO2;
 	spanfuncs_npo2[SPANDRAWFUNC_TRANSSPRITE] = R_DrawTranslucentFloorSprite_NPO2;
 	spanfuncs_npo2[SPANDRAWFUNC_TILTEDSPRITE] = R_DrawFloorSprite_Tilted_NPO2;
@@ -154,6 +157,7 @@ void SCR_SetDrawFuncs(void)
 	spanfuncs_bm_npo2[SPANDRAWFUNC_SPLAT] = R_DrawSplat_Brightmap_NPO2;
 	spanfuncs_bm_npo2[SPANDRAWFUNC_TRANSSPLAT] = R_DrawTranslucentSplat_Brightmap_NPO2;
 	spanfuncs_bm_npo2[SPANDRAWFUNC_TILTEDSPLAT] = R_DrawSplat_Tilted_Brightmap_NPO2;
+	spanfuncs_bm_npo2[SPANDRAWFUNC_TILTEDTRANSSPLAT] = R_DrawTranslucentSplat_Tilted_Brightmap_NPO2;
 	spanfuncs_bm_npo2[SPANDRAWFUNC_SPRITE] = R_DrawFloorSprite_Brightmap_NPO2;
 	spanfuncs_bm_npo2[SPANDRAWFUNC_TRANSSPRITE] = R_DrawTranslucentFloorSprite_Brightmap_NPO2;
 	spanfuncs_bm_npo2[SPANDRAWFUNC_TILTEDSPRITE] = R_DrawFloorSprite_Tilted_Brightmap_NPO2;
@@ -171,6 +175,7 @@ void SCR_SetDrawFuncs(void)
 	spanfuncs_flat[SPANDRAWFUNC_SPLAT] = R_DrawSpan_Flat;
 	spanfuncs_flat[SPANDRAWFUNC_TRANSSPLAT] = R_DrawSpan_Flat;
 	spanfuncs_flat[SPANDRAWFUNC_TILTEDSPLAT] = R_DrawTiltedSpan_Flat;
+	spanfuncs_flat[SPANDRAWFUNC_TILTEDTRANSSPLAT] = R_DrawTiltedSpan_Flat;
 	spanfuncs_flat[SPANDRAWFUNC_SPRITE] = R_DrawSpan_Flat;
 	spanfuncs_flat[SPANDRAWFUNC_TRANSSPRITE] = R_DrawSpan_Flat;
 	spanfuncs_flat[SPANDRAWFUNC_TILTEDSPRITE] = R_DrawTiltedSpan_Flat;