diff --git a/pkg/gm/portalgun/hook_map.lua b/pkg/gm/portalgun/hook_map.lua
index c486925..ce812e6 100644
--- a/pkg/gm/portalgun/hook_map.lua
+++ b/pkg/gm/portalgun/hook_map.lua
@@ -81,17 +81,19 @@ function trace_portal_transform(tf, cx, cy, cz, vx, vy, vz)
 	--print("HORIZ", hx1, hy1, hz1, hx2, hy2, hz2, ho1)
 
 	-- Get source offsets
-	local noP = (nx1*cx + ny1*cy + nz1*cz - no1)
+	local noP = -math.abs(nx1*cx + ny1*cy + nz1*cz - no1)
 	local soP = (sx1*cx + sy1*cy + sz1*cz - so1)
 	local hoP = -(hx1*cx + hy1*cy + hz1*cz - ho1)
 
+	if ny2 < 0 then noP = noP - 0.1 end
+
 	-- Update position
 	cx = (nx2*noP + sx2*soP + hx2*hoP) + no2*nx2 + so2*sx2 + ho2*hx2
 	cy = (ny2*noP + sy2*soP + hy2*hoP) + no2*ny2 + so2*sy2 + ho2*hy2
 	cz = (nz2*noP + sz2*soP + hz2*hoP) + no2*nz2 + so2*sz2 + ho2*hz2
 
 	-- Get direction offsets
-	local noV = (nx1*vx + ny1*vy + nz1*vz)
+	local noV = math.max(0.1,math.abs(nx1*vx + ny1*vy + nz1*vz))
 	local soV = -(sx1*vx + sy1*vy + sz1*vz)
 	local hoV = (hx1*vx + hy1*vy + hz1*vz)