From 8979a3dd99fad05582d7308097e326b126ef0da6 Mon Sep 17 00:00:00 2001
From: RealBadAngel <maciej.kasatkin@o2.pl>
Date: Thu, 24 Jul 2014 20:58:08 +0200
Subject: [PATCH] Dont display interior of glasslike_framed node when its not
 defined. Fixes https://github.com/minetest/minetest/issues/1514

---
 src/content_mapblock.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/content_mapblock.cpp b/src/content_mapblock.cpp
index 7708d0e7..f5b49c66 100644
--- a/src/content_mapblock.cpp
+++ b/src/content_mapblock.cpp
@@ -946,7 +946,7 @@ void mapblock_mesh_generate_special(MeshMakeData *data,
 				makeCuboid(&collector, box, &glass_tiles[i], 1, c, txc2);
 			}
 
-			if (param2 > 0){
+			if (param2 > 0 && f.special_tiles[0].texture) {
 				// Interior volume level is in range 0 .. 63,
 				// convert it to -0.5 .. 0.5
 				float vlev = (((float)param2 / 63.0 ) * 2.0 - 1.0);