When rendering with Thea through Team Render, you may experience missing textures and models with black surfaces.
This is due to the fact that the network machines have started rendering before receiving the scene’s assets.

To correct this and be sure that textures will be available prior rendering, you have to disable the ‘Clients Get Assets on Demand’ option.

You can find this option in Preferences > Renderer > Team Render > ‘Clients Get Assets on Demand’.