diff --git a/src/gl/scene/gl_walls.cpp b/src/gl/scene/gl_walls.cpp
index d9eb74354e..2e4e21e5cf 100644
--- a/src/gl/scene/gl_walls.cpp
+++ b/src/gl/scene/gl_walls.cpp
@@ -242,7 +242,7 @@ void GLWall::SplitWall(sector_t * frontsector, bool translucent)
 	for (unsigned i = 0; i < lightlist.Size(); i++)
 	{
 		lights[i].cliptop = &lightlist[i].plane;
-		lights[i].clipbottom = i == lightlist.Size() - 1 ? &bottomplane : &lightlist[i + 1].plane;
+		lights[i].clipbottom = i == lightlist.Size() - 1 ? (secplane_t*)NULL : &lightlist[i + 1].plane;
 		lights[i].lightlevel = lightlist[i].caster != NULL? gl_ClampLight(*lightlist[i].p_lightlevel) : lightlevel;
 		lights[i].colormap.FadeColor = Colormap.FadeColor;
 		lights[i].colormap.CopyFrom3DLight(&lightlist[i]);
diff --git a/src/gl/scene/gl_walls_draw.cpp b/src/gl/scene/gl_walls_draw.cpp
index 90eddd2e97..4bff69238f 100644
--- a/src/gl/scene/gl_walls_draw.cpp
+++ b/src/gl/scene/gl_walls_draw.cpp
@@ -338,17 +338,18 @@ void GLWall::RenderTextured(int rflags)
 	}
 	else
 	{
-		unsigned int store[2];
-		//RenderWall(rflags, store);
 		gl_RenderState.EnableSplit(true);
-		for (unsigned i = 0; i < lightsize; i++)
+		glEnable(GL_CLIP_DISTANCE3);
+		glEnable(GL_CLIP_DISTANCE4);
+		for (unsigned i = 0; i <lightsize; i++)
 		{
 			gl_SetColor(lights[i].lightlevel, rel, lights[i].colormap, absalpha);
 			if (type != RENDERWALL_M2SNF) gl_SetFog(lights[i].lightlevel, rel, &lights[i].colormap, RenderStyle == STYLE_Add);
-			gl_RenderState.SetSplitPlanes(*lights[i].cliptop, *lights[i].clipbottom);
-			//GLRenderer->mVBO->RenderArray(GL_TRIANGLE_FAN, store[0], store[1]);
+			gl_RenderState.SetSplitPlanes(*lights[i].cliptop, lights[i].clipbottom? *lights[i].clipbottom : bottomplane);
 			RenderWall(rflags);
 		}
+		glDisable(GL_CLIP_DISTANCE3);
+		glDisable(GL_CLIP_DISTANCE4);
 		gl_RenderState.EnableSplit(false);
 	}
 	gl_RenderState.SetTextureMode(tmode);