From 04e7c20398b34fee28c0db406af8fdff120657fa Mon Sep 17 00:00:00 2001
From: Alejandro Aguilera <fenixin@lavabit.com>
Date: Tue, 2 Aug 2011 01:35:54 +0200
Subject: [PATCH] If nothing shown return None. In iterate.c this will skip the
 draw.

---
 overviewer_core/textures.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/overviewer_core/textures.py b/overviewer_core/textures.py
index e11380f..40a45bd 100644
--- a/overviewer_core/textures.py
+++ b/overviewer_core/textures.py
@@ -581,6 +581,10 @@ def generate_special_texture(blockID, data):
             side4 = texture    # bottom right
         else: side4 = None
         
+        # if nothing shown do not draw at all
+        if top == side3 == side4 == None:
+            return None
+        
         img = _build_full_block(top,None,None,side3,side4)
         return generate_texture_tuple(img, blockID)