diff --git a/docs/config.rst b/docs/config.rst
index 5473cd3..7d8b1c8 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -349,6 +349,20 @@ values. The valid configuration keys are listed below.
                 'crop': (-500, -500, 500, 500),
         }
 
+    .. warning::
+
+        If you decide to change the bounds on a render, you may find it produces
+        unexpected results.
+
+        For an expansion to the bounds, because chunks in the new bounds have
+        the same mtime as the old, tiles will not automatically be updated. You
+        may need to use :option:`--forcerender` to force those tiles to update.
+
+        For reductions to the bounds, because there is currently no mechanism to
+        detect tiles that shouldn't exist but do, old tiles may remain and will
+        not get deleted. The only fix for this currently is to delete that
+        render directory and render it again with :option:`--forcerender`. 
+
 .. _customrendermodes:
 
 Custom Rendermodes and Rendermode Primitives
diff --git a/overviewer_core/assetmanager.py b/overviewer_core/assetmanager.py
index 26734b4..37159a2 100644
--- a/overviewer_core/assetmanager.py
+++ b/overviewer_core/assetmanager.py
@@ -78,13 +78,16 @@ directory.
         config.
 
         """
-        return self.finalize(tilesets, True)
+        self._output_assets(tilesets, True)
 
-    def finalize(self, tilesets, initial=False):
+    def finalize(self, tilesets):
         """Called to output the generated javascript and all static files to
         the output directory
 
         """
+        self._output_assets(tilesets, False)
+
+    def _output_assets(self, tilesets, initial):
         if not initial:
             get_data = lambda tileset: tileset.get_persistent_data()
         else: