Rebuild, reduce and clean up meshes

Geometry Processing Toolkits brings four classic mesh algorithms into Geometry Nodes: isotropic remeshing, QEM simplification, detriangulation and hole filling. Each one is an open node group in its own .blend file, so you can use it as a tool or read it step by step.

What's inside

• Remesh: turns uneven scan or boolean triangles into even, isotropic triangles. Split long edges, collapse short ones, flip and smooth, repeated until edges match the target size. Optional curvature-adaptive sizing (smaller triangles where the surface bends) and hard-edge protection by angle.
• QEM Mesh Simplification: reduces a mesh by collapsing the edges with the lowest quadric error (Garland and Heckbert). Target a percentage or an exact face count; optional hard-edge preservation.
• Detriangulate: pairs triangles back into quads. On a triangulated test cow it rebuilds 2,815 quads and leaves 226 triangles.
• Hole Fill: finds every open boundary loop and closes it corner by corner, sharpest angle first, until the hole is sealed. No settings: geometry in, closed geometry out. Useful before remeshing, simplifying or 3D printing a scan.

Great for

Cleaning up scans, sculpts and boolean results, making game-ready LODs, preparing meshes for simulation or further Geometry Nodes work, and learning how these algorithms work.

What's included

• Four .blend files, one per tool: Remesh.blend, QEM.blend, Detriangulate.blend and fill_hole.blend
• Each node group comes with its helpers (curvature, edge length, boundary and manifold tests)
• Demo setups on test meshes

Requirements

Blender 5.2 or newer.