diff --git a/mujoco_maze/assets/point.xml b/mujoco_maze/assets/point.xml
index e0d3302..578fce2 100755
--- a/mujoco_maze/assets/point.xml
+++ b/mujoco_maze/assets/point.xml
@@ -16,6 +16,7 @@
         <light directional="true" cutoff="100" exponent="1" diffuse="1 1 1" specular=".1 .1 .1" pos="0 0 1.3" dir="-0 0 -1.3" />
         <geom name="floor" material="MatPlane" pos="0 0 0" size="40 40 40" type="plane" conaffinity="1" rgba="0.8 0.9 0.8 1" condim="3" />
         <!--  ================= Point ================= /-->
+        <!--  Note that the solimp is modified from rllab to prevent the point from going through the wall /-->
         <body name="torso" pos="0 0 0">
             <geom name="pointbody" type="sphere" size="0.5" pos="0 0 0.5" solimp="0.9 0.99 0.001" />
             <geom name="pointarrow" type="box" size="0.5 0.1 0.1" pos="0.6 0 0.5" solimp="0.9 0.99 0.001" />
