diff --git a/overviewer.py b/overviewer.py
index 7f02289..9e9f66a 100755
--- a/overviewer.py
+++ b/overviewer.py
@@ -294,7 +294,10 @@ dir but you forgot to put quotes around the directory, since it contains spaces.
         print "tileset_dir: %r" % tileset_dir
         if not os.path.exists(tileset_dir):
             os.mkdir(tileset_dir)
-        tset = tileset.TileSet(rset, assetMrg, tex, render, tileset_dir)
+
+        # only pass to the TileSet the options it really cares about
+        tileSetOpts = util.dict_subset(render, ["name", "imgformat", "renderchecks", "rerenderprob", "bgcolor", "imgquality", "optimizeimg", "rendermode"])
+        tset = tileset.TileSet(rset, assetMrg, tex, tileSetOpts, tileset_dir)
         tilesets.append(tset)
 
    
diff --git a/overviewer_core/util.py b/overviewer_core/util.py
index 48485e6..d33e584 100644
--- a/overviewer_core/util.py
+++ b/overviewer_core/util.py
@@ -447,3 +447,14 @@ def mirror_dir(src, dst, entities=None):
                     pass
                 shutil.copy(os.path.join(src, entry), os.path.join(dst, entry))
                 # if this stills throws an error, let it propagate up
+
+
+def dict_subset(d, keys):
+    "Return a new dictionary that is built from copying select keys from d"
+    n = dict()
+    for key in keys:
+        if key in d:
+            n[key] = d[key]
+    return n
+
+