I have a weird visualization results
Scene contains only two single and simple parts
When rotating the view from top to down, they are visually overlapping on some camera angles.
Test and Check can be done here https://playground.babylonjs.com/#NXT1DQ#6
This is even more obvious on bigger scene where the visual effect is unusual.
The issue is only with some specific camera angle
This issue reminds me some bad OpenGL normal orientation but it seems that normals are ok.
Normals looks coherent here .