In my URDF file, I am defining a material in the “robot” element like this:
<material name="aluminum">
<color rgba="0.65 0.65 0.65 1"/>
</material>
I am using the material like this:
<visual>
<geometry>
<cylinder length="0.1133" radius="0.00635"/>
</geometry>
<material name="aluminum"/>
</visual>
The material specification seems to be ignored by the URDF file importer. The actor is all white.