If the V-Ray Materials are not appearing on a lab computer, try this to bring them back.
- Click V-Ray > Asset Editor.
- Click the left arrow to expand the Materials side panel.
- Click Download and wait for the files to be downloaded (about 3.5gb). It will first download 3.4gb of textures, followed by materials.
- After it's done, click Continue.
- Close V-Ray and quit Rhino.
- Start Rhino and go back into the V-Ray materials panel.
- The materials panel should now show a list of materials (you may have to click the small blue drop down arrow next to Materials to reveal the list).
- Click the Continue button.
- Now when you click on a material type such as Bricks, it should show the materials in the center column.
- Right click a material and 'Add to Scene'