--- a
+++ b/trunk/data/objects/invisible_wall_t.xml
@@ -0,0 +1,4 @@
+<Object type="FIXED_OBJECT" subtype="invisible_wall_t" layer="NORMAL">
+        <Mesh file="" />
+        <Geometry shape="RECT" extent_x="0.5" extent_y="0.5"/>
+</Object>