From 63704a8b69c861ffdad4f4f61177a2a75c3344fb Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@zdoom.fake>
Date: Sat, 4 May 2013 19:08:17 +0000
Subject: [PATCH] - Fixed: r4225 accidentally removed the sky texture check for
 markceiling disabling.

SVN r4247 (trunk)
---
 src/r_segs.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index 9d9f197db..d050d8c3b 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -2250,11 +2250,14 @@ void R_NewWall (bool needlights)
 		if (planeside <= 0)		// above view plane
 			markfloor = false;
 
-		planeside = frontsector->ceilingplane.PointOnSide(viewx, viewy, viewz);
-		if (frontsector->ceilingplane.c > 0)	// 3D floors have the ceiling backwards
-			planeside = -planeside;
-		if (planeside <= 0)		// below view plane
-			markceiling = false;
+		if (frontsector->GetTexture(sector_t::ceiling) != skyflatnum)
+		{
+			planeside = frontsector->ceilingplane.PointOnSide(viewx, viewy, viewz);
+			if (frontsector->ceilingplane.c > 0)	// 3D floors have the ceiling backwards
+				planeside = -planeside;
+			if (planeside <= 0)		// below view plane
+				markceiling = false;
+		}
 	}
 
 	FTexture *midtex = TexMan(sidedef->GetTexture(side_t::mid), true);