Unity Game Optimization - Third Edition

Avoiding complex physics components

Certain special physics Collider components, such as TerrainCollider, Cloth, and WheelCollider, are orders of magnitude more expensive than all primitive colliders and even Mesh Colliders in some cases. We should not include such components in our Scenes unless they are absolutely necessary. For instance, if we have terrain objects in the distance that the player will never approach, there's little reason to include an attached TerrainCollider component.

Games featuring Cloth components should consider instantiating different objects without them when running in lower-quality settings or simply animating cloth behavior (although it is totally understandable if the team has grown attached to and fallen in ...