Yes, I had seen that other thread and considered to move it into the CesiumJS section, but… I also wasn’t entirely sure where it belongs.
Until someone chimes in who has a better idea:
The second screenshot looks like a precision- or quanization issue. I don’t know whether there is any point where quantization comes into play. But precision might come into play: If that input contains these model like “instances”, and their position (on the globe) is given with some huuuge translation value (like a position of (400000, 300000, -450000) or so), then this could explain the effect.
One possible step towards confirming that: When you move the camera in the second screenshot, does the model stay exactly like this, or does the model “wiggle” and “deform” continuously while moving the camera?
(If it “wiggles”, then it’s probably a precision issue, similar to Precisions, Precisions | DME Component Libraries for .NET 2025 r1 - but that wouldn’t immediately help here. It would still be necessary to find out what exactly ion is generating from that input data, and whether there is a way to avoid this effect…)