diff --git a/lib/renderer/bounding_box_renderer.rb b/lib/renderer/bounding_box_renderer.rb
index 438bad1..482be96 100644
--- a/lib/renderer/bounding_box_renderer.rb
+++ b/lib/renderer/bounding_box_renderer.rb
@@ -50,7 +50,7 @@ class IMICFPS
 
       object.model.objects.each do |mesh|
         data = {}
-        box = object.normalize_bounding_box
+        box = mesh.bounding_box.normalize(object)
 
         normals  = mesh_normals
         colors   = mesh_colors(mesh.debug_color)