RetopoFlow is a suite of retopology tools for Blender built by CG Cookie. The tools are offered as addon for Blender that provides a dedicated set of mesh tools designed for retopology, creating a complete workflow in Blender without the need to add outside applications.

RetopoFlow includes several tools in the suite, all of which automatically snap the resulting mesh to the target object surface. All mesh generation is quad-based and tools are modal.

The Contours tool gives you a quick and easy way to retopologize cylindrical forms. Use cases include organic forms, such as arms, legs, tentacles, tails, horns, etc.

The tool works by drawing strokes perpendicular to the form to define the contour of the shape. Immediately upon drawing the first stroke, a preview mesh is generated, showing you exactly what you’ll get. You can draw as many strokes as you like, in any order, from any direction.

• Stroke-based contour drawing
• Easily adjust segments per contour segment
• Guide Mode: quickly generate whole sections of contour cuts in a single stroke

The Polystrips tool provides quick and easy ways create the key face loops needed to retopologize a complex model. Use cases include complex forms, such as human faces, creatures, and other organic & hard-surface objects.

The tool works by hand-drawing strokes on to the high-resolution object. The strokes are instantly converted into spline-based strips of polygons, which can be used to quickly map out the key topology flow. Clean mesh previews are generated on the fly, showing you the exact mesh that’ll be created.

• Spline-based polygon strip drawing
  • Strip manipulation with bezier spline handles
  • Easily adjust segments per strip
• 3, 4, and 5-sided patch creation from connected polystrips
  • Automatic segment updating with corresponding polystrips

You can get support for tools by reading the documentation or posting on the forums.

Pull requests are welcome! If you'd like to contribute to the project then simply Fork the repo, work on your changes, and then submit a pull request. We are quite strict on what we allow in, but all suggestions are welcome. If you're unsure what to contribute, then look at the open issues for the current to-dos.