Jan van den Hemel writes: The BSurfaces add-on is included with Blender and allows us to easily sketch retopology guides with the annotate tool, which is then turned into actual geometry. It’s very quick to use and essential in anyone’s retopology toolset.
from BlenderNation https://www.blendernation.com/2022/01/21/retopology-with-bsurfaces-and-annotation/
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