Rendering artifacts and broken clipping on 13-inch 2019 MacBook Pro

[kring]

UE 5.2 / Cesium for Unreal doesn't work very well on this machine. I'm inclined to blame the terrible GPU (an "Intel Iris Plus Graphics 655 1536 MB"), but I don't know for sure.

Tilesets with raster overlays have visible triangle edges for no apparent reason:

Also, polygon clipping doesn't work reliably. The box you can see at the top of the screenshot should be excluding Cesium OSM Buildings inside it. Instead, some buildings (presumably the large ones from low-detail tiles) are completely visible, and for the rest the triangle edges are visible again:

[kring]

It also doesn't like something about the custom material in the 10_CesiumOSMWindows_Metadata level:

[kring]

It's not just tilesets with raster overlays that show triangle edges. Here's Google Photorealistic 3D Tiles:

[kring]

The same (or very similar) problem was noted on the community forum on a Windows 11 machine. Also with an Intel integrated GPU.
https://community.cesium.com/t/google-photorealistic-3d-tiles-prevent-these-thin-lines/35035