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Can material colors be applied to Collada (.dae) meshes?

Hello,

I have both STL and Collada (.dae) versions of several meshes (Dynamixel servos and brackets) and I can view both in RViz when used in the URDF file for my robot. However, the material colors I specify for the meshes appear only when using the STL versions of the meshes. When using the Collada (.dae) versions, all meshes appear white regardless of the material or color tags I use in the URDF file. Does one have to specify the material or color differently when using Collada meshes?

P.S. You may ask why I don't just use the STL files and it is because on one of my machines there is a graphics driver bug that prevents the STL meshes from appearing in RViz but the Collada versions appear fine, although without the colors.

Can material colors be applied to Collada (.dae) meshes?

Hello,

I have both STL and Collada (.dae) versions of several meshes (Dynamixel servos and brackets) and I can view both in RViz when used in the URDF file for my robot. However, the material colors I specify for the meshes appear only when using the STL versions of the meshes. When using the Collada (.dae) versions, all meshes appear white regardless of the material or color tags I use in the URDF file. Does one have to specify the material or color differently when using Collada meshes?

P.S. You may ask why I don't just use the STL files and it is because on one of my machines there is a graphics driver bug that prevents the STL meshes from appearing in RViz but the Collada versions appear fine, although without the colors.

UPDATE:

I have figured out a work-around in the meantime: First I imported the TurtleBot's kinect.dae file into Blender, then I imported the AX-12 STL file, and finally, I copyied the material from the Kinect object to the AX-12 object. Then I deleted the Kinect object and exported the AX-12 as a Collada file. At least now I have black servos in RViz!