Overview
pr2_ogre defines the PR2 materials for Gazebo/Ogre and provides texture files for the PR2 casters.
GAZEBO_RESOURCE_PATH
In order to use the pr2_ogre media with gazebo, add the root of the pr2_ogre package to your GAZEBO_RESOURCE_PATH. For example, in roslaunch:
<env name="GAZEBO_RESOURCE_PATH" value="$(find pr2_ogre):$(find pr2_description):$(find gazebo_worlds):$(find gazebo)/gazebo/share/gazebo" />