diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 67eb5d41a..25d1a93b1 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -687,7 +687,7 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 	{
 		// Hurdler: add scrolling texture on floor/ceiling
 		v3d->sow = (float)((pv->x / fflatsize) - flatxref + scrollx);
-		v3d->tow = (float)(-(pv->y / fflatsize) + flatyref - scrolly);
+		v3d->tow = (float)(-(pv->y / fflatsize) + flatyref + scrolly);
 
 		//v3d->sow = (float)(pv->x / fflatsize);
 		//v3d->tow = (float)(pv->y / fflatsize);
diff --git a/src/p_spec.c b/src/p_spec.c
index 01518d658..ef74b0ae5 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -5759,12 +5759,12 @@ void P_SpawnSpecials(INT32 fromnetsave)
 					if (lines[i].flags & ML_NOKNUX) // Set offset through x and y texture offsets if NOKNUX flag is set
 					{
 						xoffs = sides[lines[i].sidenum[0]].textureoffset;
-						yoffs = sides[lines[i].sidenum[0]].rowoffset;
+						yoffs = -sides[lines[i].sidenum[0]].rowoffset;
 					}
 					else // Otherwise, set calculated offsets such that line's v1 is the apparent origin
 					{
 						xoffs = -lines[i].v1->x;
-						yoffs = -lines[i].v1->y;
+						yoffs = lines[i].v1->y;
 					}
 
 					for (s = -1; (s = P_FindSectorFromLineTag(lines + i, s)) >= 0 ;)
diff --git a/src/r_plane.c b/src/r_plane.c
index 8d24c2f7d..19bd85ad2 100644
--- a/src/r_plane.c
+++ b/src/r_plane.c
@@ -959,6 +959,8 @@ void R_DrawSinglePlane(visplane_t *pl)
 		// Okay, look, don't ask me why this works, but without this setup there's a disgusting-looking misalignment with the textures. -Red
 		const float fudge = ((1<<nflatshiftup)+1.0f)/(1<<nflatshiftup);
 
+		yoffs *= 1;
+
 		xoffs &= ((1 << (32-nflatshiftup))-1);
 		yoffs &= ((1 << (32-nflatshiftup))-1);