Thanks, gentlemen!   - Support Answer - Kirk Clemons Wednesday, Sep 12, 2018 - 01:29 PM PDT It appears that this is actually due to the plant images. If you turn off the plant's layer, the lampshade material renders correctly. This has been reported to our developers. As to your question regarding the materials being added to your library, yes, you can. If you open the plan materials dialog and select any material in the list, you can