Video 11: HLOD INSTANCED UEFN Aggressive Performance Optimization GameDevMicah UE 5.5.0/UEFN 31.20

Summary

An exploration of advanced UEFN optimization techniques, focusing on utilizing Instanced Static Meshes (ISMs) and Hierarchical Level of Detail (HLOD) to reduce project file size and improve performance.

Highlights

HLOD and Instancing Advantages00:10:00

Breaks down why ISM components are more efficient than individual static meshes once multiple instances exist. Explains how the GPU handles instanced data more effectively than the CPU-bound standard actor replication.

Project Optimization via ISMs00:00:00

Discusses how converting merged meshes to Instanced Static Meshes (ISMs) significantly reduces project file size and improves rendering efficiency. Emphasizes the importance of restarting the editor to properly refresh package sizes and clear outdated HLOD data.

Implementing Custom ISMs00:06:44

Explains the process of creating custom simplified meshes and materials for instancing. Demonstrates how to enable 'Used with Instance Static Meshes' in materials to ensure objects can be effectively instanced, reducing the number of draw calls.

Extreme Optimization Strategies00:14:37

Introduces aggressive optimization techniques like setting loading ranges to zero to keep assets loaded as ISMs. Covers the necessity of implementing custom, simplified collision boxes to replace standard actor collisions for better server and client performance.