The workflow for Sketchy FFD is cyclical:
To be clear upfront: originally developed around SketchUp 6–8. There is no official, maintained paper or documentation from a publisher. However, here is the proper, citeable source information and original documentation. sketchy ffd sketchup plugin
When using Sketchy FFD, users frequently report "glitches." Here is why they happen and how to fix them. The workflow for Sketchy FFD is cyclical: To
Chris Fullmer (with contributions from others in the SketchUp community) Title: Sketchy FFD (Free-Form Deformation) Type: Ruby plugin for Google SketchUp / Trimble SketchUp Original Release: ~2007–2009 Last Stable Version: v1.4 (approx.) Original Hosting: SketchUcation Plugin Store (now legacy) Current Status: Abandoned; not compatible with SketchUp 2017+ (Ruby 2.5+ breaks it) When using Sketchy FFD, users frequently report "glitches
I understand you're looking for a "proper paper" or legitimate documentation/source for the (Free-Form Deformation) plugin for SketchUp.