Unity Game Optimization - Third Edition

Using simpler Mesh Colliders

Similarly, the mesh assigned to a Mesh Collider does not necessarily need to match the graphical representation of the same object (Unity simply picks it as the default). This allows us to assign a simpler mesh to the Mesh Collider's mesh property, which is different from the one we use for its graphical representation.

The following screenshot shows an example of a sophisticated graphical mesh that has been given a much more simplified mesh for its Mesh Collider:

Simplifying the rendered mesh into convex shapes with lower polygon counts in this way will significantly reduce the overhead needed to determine bounding ...