3D Scan Retopology: Converting Dense Photogrammetry to Production Quads
Transform heavy, unstructured 3D scan meshes into clean quad models ready for rigging, UV unwrapping, and real-time engine deployment.
Photogrammetry and laser 3D scans deliver photorealistic real-world detail, but their raw outputs consist of millions of non-manifold triangles. Converting these raw scans into quad topology is essential for clean UV unwrapping and animation deformation.
1. Preparing Mesh Geometry and Decimation Pre-Passes
Before retopologizing, clean the scan data using Blender’s Sculpt Mode Smooth and Voxel Remesh tools to close surface holes. Apply a light Decimate modifier to reduce polygon density without losing key anatomical or hard-surface silhouette details.
2. Manual Retopology with Snap-to-Face and Shrinkwrap
Enable Face Project Snapping with Align Rotation to Target enabled. Lay quad poly-strips over key deformation zones, then apply a Shrinkwrap Modifier targeted to the original high-poly scan mesh to project surface contours perfectly.
3. Baking High-Poly Color and Surface Details to Normal Maps
Unwrap the clean quad mesh and use Cycles Selected to Active texture baking to transfer vertex colors and high-frequency surface noise from the raw scan onto low-poly Normal and Albedo texture maps.