Scene Graph mesh and particle components reduce FPS significantly more than standard static meshes and Niagara systems.

General Issues and Bug Reporting
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1

Summary

Scene Graph mesh and particle components reduce FPS significantly more than standard static meshes and Niagara systems. That makes building with entities pretty hard.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

  1. Create a blank project.
  2. Place 2–3 thousand static mesh cubes or Niagara systems next to each other.
  3. Launch the session and observe the FPS.
  4. Repeat using entities with mesh or particle components, then observe the FPS again.

Expected Result

Same FPS as with normal assets.

Observed Result

FPS dropped from 170 to 80.

Platform(s)

PC, Windows 11

2

Bumping. This is a huge issue and a blocker for using scenegraph. The difference in cost between a scenegraph entity with a mesh component and a standard mesh actor is VERY noticeable. Empty island = ~165fps, Island with 1000 static mesh actors = ~160 fps, Island with 1000 scenegraph entities with a cube mesh component = ~80fps

5

FORT-1090450’s status has changed to ‘Ready for QA’. A member of the QA department is investigating the issue.