diff --git a/src/rendering/hwrenderer/scene/hw_drawlistadd.cpp b/src/rendering/hwrenderer/scene/hw_drawlistadd.cpp
index 9b2e9d57c3..8a862e29aa 100644
--- a/src/rendering/hwrenderer/scene/hw_drawlistadd.cpp
+++ b/src/rendering/hwrenderer/scene/hw_drawlistadd.cpp
@@ -49,7 +49,7 @@ void HWDrawInfo::AddWall(HWWall *wall)
 		bool masked = HWWall::passflag[wall->type] == 1 ? false : (wall->texture && wall->texture->isMasked());
 		int list;
 
-		if ((wall->flags & HWWall::HWF_SKYHACK && wall->type == RENDERWALL_M2S))
+		if (wall->flags & HWWall::HWF_SKYHACK && wall->type == RENDERWALL_M2S)
 		{
 			list = GLDL_MASKEDWALLSOFS;
 		}
diff --git a/src/rendering/hwrenderer/scene/hw_walls.cpp b/src/rendering/hwrenderer/scene/hw_walls.cpp
index 94901093bc..6ae94fc966 100644
--- a/src/rendering/hwrenderer/scene/hw_walls.cpp
+++ b/src/rendering/hwrenderer/scene/hw_walls.cpp
@@ -1443,6 +1443,11 @@ void HWWall::DoMidTexture(HWDrawInfo *di, seg_t * seg, bool drawfogboundary,
 		tci.mScale.Y = -tci.mScale.Y;
 		flags |= HWF_NOSLICE;
 	}
+	if (seg->linedef->isVisualPortal())
+	{
+		// mid textures on portal lines need the same offsetting as mid textures on sky lines
+		flags |= HWF_SKYHACK;
+	}
 	SetWallCoordinates(seg, &tci, texturetop, topleft, topright, bottomleft, bottomright, t_ofs);
 
 	//
@@ -2165,6 +2170,12 @@ void HWWall::Process(HWDrawInfo *di, seg_t *seg, sector_t * frontsector, sector_
 			zbottom[0] = bfh1;
 			zbottom[1] = bfh2;
 			PutPortal(di, PORTALTYPE_LINETOLINE, -1);
+
+			if (texture && seg->backsector != nullptr)
+			{
+				DoMidTexture(di, seg, drawfogboundary, frontsector, backsector, realfront, realback,
+					fch1, fch2, ffh1, ffh2, bch1, bch2, bfh1, bfh2);
+			}
 		}
 		else
 		{