diff --git a/src/gl/renderer/gl_renderstate.h b/src/gl/renderer/gl_renderstate.h
index 87df78a6b..7436135a6 100644
--- a/src/gl/renderer/gl_renderstate.h
+++ b/src/gl/renderer/gl_renderstate.h
@@ -275,14 +275,18 @@ public:
 
 	void SetGlowPlanes(const secplane_t &top, const secplane_t &bottom)
 	{
-		mGlowTopPlane.Set(top.fA(), top.fB(), 1. / top.fC(), top.fD());
-		mGlowBottomPlane.Set(bottom.fA(), bottom.fB(), 1. / bottom.fC(), bottom.fD());
+		DVector3 tn = top.Normal();
+		DVector3 bn = bottom.Normal();
+		mGlowTopPlane.Set(tn.X, tn.Y, 1. / tn.Z, top.fD());
+		mGlowBottomPlane.Set(bn.X, bn.Y, 1. / bn.Z, bottom.fD());
 	}
 
 	void SetSplitPlanes(const secplane_t &top, const secplane_t &bottom)
 	{
-		mSplitTopPlane.Set(top.fA(), top.fB(), 1. / top.fC(), top.fD());
-		mSplitBottomPlane.Set(bottom.fA(), bottom.fB(), 1. / bottom.fC(), bottom.fD());
+		DVector3 tn = top.Normal();
+		DVector3 bn = bottom.Normal();
+		mSplitTopPlane.Set(tn.X, tn.Y, 1. / tn.Z, top.fD());
+		mSplitBottomPlane.Set(bn.X, bn.Y, 1. / bn.Z, bottom.fD());
 	}
 
 	void SetDynLight(float r, float g, float b)
diff --git a/src/gl/utility/gl_geometric.cpp b/src/gl/utility/gl_geometric.cpp
index ef9bc88d4..c2ea6da59 100644
--- a/src/gl/utility/gl_geometric.cpp
+++ b/src/gl/utility/gl_geometric.cpp
@@ -227,16 +227,9 @@ void Plane::Init(float a, float b, float c, float d)
 
 void Plane::Set(secplane_t &plane)
 {
-   float a, b, c, d;
-
-   a = (float)plane.fA();
-   b = (float)plane.fB();
-   c = (float)plane.fC();
-   d = (float)plane.fD();
-
-   m_normal.Set(a, c, b);
+   m_normal.Set(plane.Normal().X, plane.Normal().Z, plane.Normal().Y);
    //m_normal.Normalize(); the vector is already normalized
-   m_d = d;
+   m_d = plane.fD();
 }