Gaussian splat meshes won’t render at all until the camera is completely stationary for some period of time. I’m guessing this is due to the way that the points are sorted in another thread and when/how the data is propagated to that thread.
Demo: Babylon.js Playground - #CID4NN#397
The camera starts in motion and this results in the splat not being displayed. Clicking on the window will stop the camera motion, at which point the splat will be displayed.