You can find the extension on the Vali Architects Official Website or the SketchUp Extension Warehouse . Pricing: A yearly subscription is approximately $38.00 .
Once you have purchased and downloaded the .rbz file (usually named InstantRoadNui_v3.rbz ), follow these steps: SketchUp Instant Road Nui Plugin #2 - Vali Architects Sketchup Instant Road Plugin Download
Before generating, open the Instant Road Settings dialog box. You must customize: You can find the extension on the Vali