In 2021, many Rhino veterans still relied on the classic freeware tool WinTopo. It wasn't a Rhino plugin per se, but it was the standard companion tool. You would rasterize your image in WinTopo, convert it to a DXF vector file, and import it directly into Rhino. It produced surprisingly clean polylines for topographical maps.
Imagine you have a 1940s architectural blueprint scan: vectorize plugin rhino 2021
Type: Free, Native (but discontinued support after 2020, community patches exist) Note for 2021 users: The original "Trace" plugin for Rhino 5/6 requires manual installation in Rhino 7. Community forums provide updated DLLs. It offers basic centerline and outline tracing. While not glamorous, it is the lightest option. In 2021, many Rhino veterans still relied on