Summary
Im making a 4 player base building island where everyone builds on their own plot. Props are spawned at runtime and movable, a maxed base is ~150 props so a full lobby is 600+ replicated actors.
Performance tanks as bases grow, we tested it, empty plots run fine and missed frames climb the more players build. Switch and mobile get hit hardest (10-40% missed frames vs 0.5% on next gen). We already converted everything static, removed idle vfx and added culling, didnt help because its a replication flood not rendering.
Problem is theres literally nothing to adjust in uefn. No relevancy distance, no update rate, no dormancy, and the limits arent documented anywhere.
Even something simple would fix it, other players bases are basically scenery so a dormancy option or per prop replication distance would solve this whole genre. Right now the only options are capping builds or spreading plots super far apart.
Happy to share the project or test data if anyone from epic wants to look.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Stability
Steps to Reproduce
1. Create an island with 4 player plots placed within replication range of each other (under ~100m apart)
2. Using scene graph, allow each player to spawn movable props at runtime on their plot (grid based building, ~150 props per plot when fully built)
3. Start a session with 4 players on low end hardware (Switch or mobile shows it clearest)
4. With empty plots, note performance is normal
5. Have all 4 players build out their plots and observe missed frames climbing as total placed prop count increases
6. Fully built (600+ replicated actors total) the session shows severe missed frames on Switch/mobile (10-40% in our creator portal analytics) while next gen hardware stays around 0.5%
Expected Result
creators have some way to manage replication load from runtime spawned props (relevancy distance, update rate or dormancy), or documented limits to design within
Observed Result
no creator facing settings exist for replication, performance degrades with no way to address it beyond removing gameplay content or spreading plots beyond an undocumented distance
Platform(s)
All platforms, most severe on: Nintendo Switch, Mobile (iOS/Android)
Also affected: PC, PS4/Xbox One (last-gen)
Least affected: PS5/Xbox Series X|S
Island Code
3417-3153-6183