Disappearing Glass issue. Sorting or mesh problem, not sure

[Leonidas]

This happens because these entities are thin and packed together, so the engine can’t do alpha blending / sorting properly at extreme angles.

Check this for possible solutions:

Objects dissappearing

It is alpha sorting problem you have here. Alpha blended entities will be sorted based on Z distance of their AABB to camera. It is not reliable way to sort, as it does not takes complexity of geometry in account. But alpha sorting is generally tough question out there. So one way is to give developer a control over it, and there is few ways. For example with blue circles you simply want to disable depth test all together. So they always drawn on top of everything else. With different parts,…