Hi, I'm trying to create a URDF model for my robot, which happens to be an R2-D2 replica so I was thrilled to find the wiki contains a series of tutorials that create a R2-D2 URDF. I'm trying to follow the tutorial on my robot's computer, a Zotac Zbox (NVIDIA ION-based) which I'm connecting to via VNC. Is it possible that those tutorials are outdated and the URDF syntax and semantics have changed? It seems that transforms and materials don't behave the way they should. This is how the second tutorial step should look like according to the wiki: