Because SketchUp 2015 is nearly a decade old, official download links are dead. Here are safe, legitimate sources:
Internet Archive (Wayback Machine):
Russian 3D forums (for archival purposes only):
Do NOT use 2020-2025 versions (Curviloft v2.0a). They require SketchUp 2017+ and will crash 2015 immediately.
Cause: The file is corrupt or misnamed.
Fix: Rename it to Curviloft.rbz (remove "66"). If still fails, use the official 1.8d from SketchUcation archives (requires free account).
Curviloft is one of the most powerful SketchUp extensions for lofting, skinning and generating smooth surfaces from curves and profiles. If you’re using SketchUp 2015 and came across the term “Curviloft plugin SketchUp 2015 66” (often referencing version/build numbers or forum threads), here’s a concise, practical blog post you can use.
