For this particular case I used a free plug-in which I showed in detail in another of my videos. It's extremely powerful compared to Rhino's native filleting capabilities. Here is the overview video that shows various examples with that plug-in in action. You can find a download link in its description, as well: The 3d model seen in the thumbnail image has two different display modes assigned to its surfaces. The graphite one is called "Crackdown 1", while the yellow one is "Зайо Байо" (written in Bulgarian alphabet in my Rhino 7). Both custom display modes could be downloaded from the following topic on the official Rhino forum: -------------------------------------------------------------- 💚 If you like my work, you can support me with a small gift that will help me create more content like this 💚 PayPal: