Cut solids with explicit ownership.

Two native Brush inputs are evaluated into one indexed result through Evaluator, with operation and grouped-material policies kept visible.

This route verifies local CSG operation/rebuild behavior. The official dynamic icosahedron/cylinder composition, GUI/Stats presentation, exact animated pixel output, device/backend coverage, and whole-example fidelity remain separate.

Sources: official CSG example · three-bvh-csg