Does mobility of actors dynamically affect for level optimization?

Development World Creation
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1

I build forest level that used PCG.

By the way my level is so heavy and slow than Electric Dreams Level

So, I Compared two project and find difference. It is Actor’s Mobility.

Actor’s mobility dynamically affect level optimization?

2

Hello @Leafle.lune, yes, the mobility setting of your actors directly impacts level optimization and performance. Using actors with Movable mobility means the engine must compute dynamic lighting and shadows in real-time, which significantly affects performance, especially in dense environments like a PCG-generated forest.

For best optimization:

  • Set your foliage and static actors to Static whenever possible, allowing Unreal Engine to use precomputed lighting for improved performance.
  • Consider using Instanced Static Meshes or Hierarchical Instanced Static Meshes for vegetation to reduce draw calls and optimize rendering.

This page provides detailed explanations of the three mobility settings Static, Stationary, and Movable and their impact on performance and lighting.

Expert’s guide to unreal engine performance

I hope this information is helpful to you. If you need assistance with something more specific, feel free to comment on the thread.