diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index bec9cdb1..18eecb77 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -1719,12 +1719,12 @@ static void HWR_StoreWallRange(double startfrac, double endfrac)
 				if (!(gr_linedef->flags & ML_DONTPEGBOTTOM))
 					texturevpegbottom = 0;
 				else if (gr_linedef->flags & ML_EFFECT1)
-					texturevpegbottom = worldtop - worldlow;
+					texturevpegbottom = worldbottom - worldlow;
 				else
-					texturevpegbottom = gr_frontsector->ceilingheight - gr_backsector->floorheight;
+					texturevpegbottom = gr_frontsector->floorheight - gr_backsector->floorheight;
 #else
 				if (gr_linedef->flags & ML_DONTPEGBOTTOM)
-					texturevpegbottom = worldtop - worldlow;
+					texturevpegbottom = worldbottom - worldlow;
                 else
                     texturevpegbottom = 0;
 #endif
@@ -1752,9 +1752,9 @@ static void HWR_StoreWallRange(double startfrac, double endfrac)
 				else if (gr_linedef->flags & ML_DONTPEGBOTTOM)
 				{
 					// Skewed by bottom
-					wallVerts[0].t = (texturevpegbottom + worldlow - worldbottom) * grTex->scaleY;
-					wallVerts[2].t = wallVerts[3].t - (worldlowslope - worldlow) * grTex->scaleY;
-					wallVerts[1].t = wallVerts[2].t - (worldbottomslope - worldlowslope) * grTex->scaleY;
+					wallVerts[0].t = wallVerts[1].t = (texturevpegbottom + worldlow - worldbottom) * grTex->scaleY;
+					//wallVerts[3].t = wallVerts[0].t - (worldlow - worldbottom) * grTex->scaleY; // no need, [3] is already this
+					wallVerts[2].t = wallVerts[1].t - (worldlowslope - worldbottomslope) * grTex->scaleY;
 				}
 				else
 				{