World building with code Parts and models - Set properties first, parent last (one replication/physics insert). Anchor static geometry. - Move/rotate models with / ; / define the pivot. - Group logically related parts in Models (streaming, LOD, ), not giant containers. - Decorative parts: , for tiny details. - Materials: ; custom looks via in (set ) or on MeshParts (PBR). is superseded by . - Many identical meshes are cheap (instanced); many unique meshes/unions are not. Lighting | Property | Guidance | | --- | --- | | | (naturalistic) or (stylized). Replaces the superseded . | | | Prefer qua…