Optimizing Texture Loads in Tilesets

frederikP · April 28, 2023, 7:00am

Hello,

I have several tilesets composed of several glTFs that load the same texture (for buildings).

These texture loads are time-consuming and performance-intensive. Do you have any ideas on how I can easily solve this problem?

For example, could I reuse the UTexture2D* between tiles and CesiumGltfComponents? Are there any points I should be vigilant about when implementing such a system?

Also, do you have a similar development planned on your roadmap?

Thank you!

Kevin_Ring · May 4, 2023, 12:58am

Currently, there is no workaround for this problem. We have an issue to track this, though:

github.com/CesiumGS/cesium-native

Cache and reuse render resources for external images

opened 07:19PM - 03 May 22 UTC

nithinp7

enhancement performance

@sanjeetsuhag brought to my attention that CesiumJS saw some significant perform…ance improvements in tilesets outputted by the CDB to 3D Tiles converter by introducing an in-memory cache for external images. Apparently the converter makes extensive use of external images and often shares the same external images amongst several tiles. I have particularly noticed frequent freezes in Cesium for Unreal / Cesium Native that can last multiple seconds when viewing the Aden, Yemen tileset (an OGC CDB dataset converted to 3D Tiles Next), with excessive texture memory being the almost guaranteed culprit. We should modify our image API to make it possible to cache external image renderer resources.