Hi, I have an aircraft actor which has multiple cameras attached to it, all can look in different directions in the world. With single camera there is no performance issues and frame rate is smooth, but when i register more than one camera and update its properties (location, rotation) in tick ther…

Hi @dis_afise , Great question, are your additional cameras rendering essential to the applications functionality? If your application incorporates multiple views - A performance hit would be expected as you’re rendering more, and viewing more 3D Tiles, potentially at a higher LOD. You can alter …

If I may enter the discussion, I believe I encounter the exact same issue as @dis_afise did. The main issue for me is overlapping cameras, for instance a WIDE camera and a NARROW camera looking at the exact same location on the ground, both streaming their images. For instance if you wanted to sim…

Thanks for the addition @byjtew ! I’m curious to know if this is a performance hit due to multiple frustums in the Cesium for Unreal camera manager being considered, or if it inherently is due to the amount of rendering induced by 2 active cameras, one viewing high resolution tiles. Have you seen a…

I’m curious to know if this is a performance hit due to multiple frustums in the Cesium for Unreal camera manager being considered, or if it inherently is due to the amount of rendering induced by 2 active cameras, one viewing high resolution tiles. Definitely due to multiple frustums, I run the …

Hi @byjtew and @dis_afise , I ran a test below without being able to recreate it, so if you could share the exact version of Unreal you’re using, and perhaps any other interaction considerations I might have missed, that would help. I have two cameras, one rotating over the other, both registered a…

Throwing this into the chain, I ran into a similar problem. In Unreal 5.7.1 trying to utilize NDisplay in Unreal, I would get poor performance spikes every 3-4 seconds and the overall performance struggled. My NDisplay configuration did have overlapping viewports. I rolled it back to Unreal 5.6.1 a…

@Ben i tried updating my UE version to 5.7.4 and cesium plugin to 2.24.1 but the same issue persists, i have attached a video link showing the main player camera and secondary camera registered via camera manager, both are situated at same place looking at different directions but the FPS drop is st…

Thank you both, the recording helps a lot. I’ve opened an issue here → Multiple registered cameras performance issue · Issue #1823 · CesiumGS/cesium-unreal · GitHub

Thanks @byjtew ! We always appreciate contributions from the community towards our opensource projects!

Multiple Registred Cameras Performance Issue

Cesium for Unreal

byjtew July 25, 2026, 7:10pm 11

I believe I have identified the bug. It’s a massive blocker for our company product and it seems like it got under control now.
I’ll push a PR for it.

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Multiple Registred Cameras Performance Issue

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