From 3d7661e7e9edce233c5edf175829bc689d018f1a Mon Sep 17 00:00:00 2001
From: jj <john-git@ofjj.net>
Date: Mon, 14 Oct 2013 00:01:26 +0200
Subject: [PATCH] ruby: fix map tile material reading

---
 plugins/ruby/map.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/ruby/map.rb b/plugins/ruby/map.rb
index 647a52849..934f37659 100644
--- a/plugins/ruby/map.rb
+++ b/plugins/ruby/map.rb
@@ -175,7 +175,7 @@ module DFHack
 
         # return the RegionMapEntry (from designation.biome)
         def region_map_entry
-            b = designation.biome
+            b = mapblock.region_offset[designation.biome]
             wd = df.world.world_data
 
             # region coords + [[-1, -1], [0, -1], ..., [1, 1]][b]