Case Study: Rocks

Project Target & Shot Conditions

The aim of this project was to track a camera sequence over organic rock geometry with unknown settings, extrapolate a virtual camera path, extract a raw 3D mesh directly from the tracking details, and recreate a new mesh with clean topology directed towards production.

Raw 3D mesh extractions are highly complex, often yielding millions of unordered polygons. Converting this raw information into a low-poly asset with consistent flow lines (retopology) allows the asset to be textured, animated, and rendered efficiently in visual effects pipelines.

Adopted Workflow

1. Dynamic Matchmove: Reconstructing the camera path utilizing high-density tracker clusters on the rock features.
2. Mesh Extraction: Extrapolating a high-density raw 3D mesh surface based on solved point cloud depth planes.
3. Retopology: Rebuilding the surface manually using quad-dominant topology flowing along the organic curves of the rocks.
4. Baking & Detail Transfer: Projecting high-resolution micro-details and textures from the raw scan onto the optimized low-poly model.

Solver Challenges & Solutions

Organic Depth Occlusion: Irregular rock formations create complex parallax depth layers that obscure tracking points. High-precision tracker groups were set across foreground, midground, and background to anchor the camera solve.

High Polygon Density: Raw depth extractions are too heavy for game engines and rendering engines. Manual retopology was executed to structure clean loop structures, reducing polygon count while preserving silhouette details.