Collision & LODs

How collision and detail levels are built.

Collision as BVH

Collision is embedded in the YDR as a bound composite with a BVH geometry. Convex hulls are reduced to at most 2,000 triangles, mesh collisions to at most 9,000 – enough detail without stressing physics.

LOD levels

With LODs enabled, up to three extra levels are created with 50%, 20% and 6% of the triangles. Very simple models (under 600 triangles) get no LODs because there's nothing to save.

Draw distance

On Auto the draw distance follows the prop's size (60–500 m). You can set it manually too, e.g. for small decoration that should only show up close.