Using projectors in Gazebo 1.9 + ROS Hydro?

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I was trying to create an example projector project to demonstrate some problems I was having with projector poses, but couldn't get the texture to appear at all, there is just what appears a default error image with yellow diagonal bars on black.

example image on github, (don't have karma to upload and providing a link isn't working)

This is the xacro file responsible:

<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro" name="projector_test">

<link name="world"/>

<link name="link_projector">
  <visual>
    <geometry>
      <cylinder length="0.2" radius="0.05" />
    </geometry>
  </visual>
  <inertial>
    <mass value="1.0"/>
    <inertia ixx="1.0" ixy="0.0" ixz="0.0" iyy="1.0" iyz="0.0" izz="1.0" />
  </inertial>
</link>

<joint name="joint_projector" type="fixed">
  <origin xyz="0 0 2.0" rpy="0.0 0 0" />
  <parent link="world" />
  <child link="link_projector" />
</joint>

<gazebo reference="link_projector">
  <projector name="projector_test1">
    <pose>0 0 0 0 0 0</pose>
    <!-- this isn't getting loaded properly -->
    <texture>$(find projector_test)/urdf/test_pattern.png</texture>
    <!--texture>test_pattern.png</texture-->
    <fov>0.6</fov>
    <near_clip>0.1</near_clip>
    <far_clip>10.0</far_clip>
  </projector>
</gazebo>

</robot>

This is from projector test, there is also a launch file there and catkin package.xml and CMake files, roslaunch projector_test projector_test.launch launches it.

In another project I was able to make projectors work somewhat, I had the png in a meshes dir and I think that because another resource was loaded from the same directory (and which had a full path) the png was able to be found.