Making huge games in unity can quickly lead to problems - hopefully this video can help you to avoid them. Links: CrossScene Reference / GUID Based Reference: Material Property Override: NavMeshComponents: Video Devlog by Robert Thomson: Timestamps: 00:00 - Intro 00:39 - Hardware 01:13 - Lighting 02:09 - Pro Builder 03:16 - Editor Performance 04:45 - Runtime Performance 06:53 - Planning for Performance 07:59 - No Automatic Systems 09:01 - Finding Close Objects 09:57 - Physics 11:22 - Non Player Characters (NPCs) 13:05 - Memory Management 13:48 - Reuse Assets 14:35 - Coding 15:01 - Profiling 15:59 - Keep Things Simple 16:27 - Summary 17:42 - Outro My Twitter: