Retopo Planes is a Geometry Nodes modifier designed to streamline the retopology of 3D clothing. The workflow involves converting high-poly 3D garments into flat 2D patterns, allowing users to guide the new topology by placing simple primitive planes over the flattened shapes. It utilizes the source garment's UV coordinates to generate a clean, quad-based mesh that wraps accurately back into the 3D form.

The system includes features for both automatic and manual edge density control across joined sections, ensuring matching vertex counts along seams. Users can define seam separations using edge bevel weights and use built-in border snapping for alignment. Additional capabilities include support for darts and circular holes, symmetry handling, thickness generation, and automatic subdivision with detail reprojection from the original source mesh.