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Bsurfaces is a modeling and retopology tool which combines the use of freehand strokes, bezier curves or loose edges to generate polygonal surfaces. It can be included in a traditional polygonal and subdivision modeling workflow, speeding it up substantially.
Bsurfaces is a Blender add-on, it can be used to build both open and closed shapes, extrude selections, bridge between two selections, having full control over the shape, direction, and twisting of the final surface. The output is a clean topology composed of quadrilateral faces. Triangles are also possible when building surfaces using crossing strokes.
The different options can be modified interactively, allowing to see how they affect the resulting surface in real-time.
Voice by Jonathan Cooke: jonathan.cooke (at) live.com
Music by Travis Morgan: ccmixter.org/people/morgantj