Oops. I did a test render, but did not save the file while closing Carrara. I think the best method is to do as I do: 1. Select al squares 2. Delete them 3. Insert new Spline Object 4. Draw small square 5. Copy square 6. Paste square 7. Move square next to original square 8. Select both squares 9. Copy 10. Paste 11. Select all squares 12. Copy 13. Paste ... repeat until you filled the whole grid with squares. 14. Select the front point of the extrusion path on the right side 15. Go to 'Sections' -> create 16. Go to the 'Cross Section' part in the right drawer bar 17. Click 'front bevel' 18. Voila. The same pattern, but now you can use one shader accross the whole thing. I used an 'add' operator in the shader part of a 'gradient' color, and two mixers (one with a horizontal and one with a vertical gradient)(?)(I did not save the document...). But the colors did not exactly match your gradient above. You can always use a texture map to get the exact gradient on there. The main thing is the other way of moddeling the squares. Good luck!