Multiple 3D Models with transparent texture overlapping together rendered in wrong order.

2025-02-27 13-38-19.mp4

Here’s a simple demo: A cube is overlapped on top of a plane. Both objects are assigned custom materials, which contain a map with an alpha channel.
No matter what the depth draw mode is, there’s always an issue with the blending effect and rendering order.
RenderDoc shows that the rendering order of transparent objects depends on the axis (or pivot) point.

Workaround: Change the depth bias when the scene is simple.

Tested version: Qt 6.5 and above, including 6.8 6.9

Demo Code:

https://filesender.qt.io/?s=download&token=ae091324-42ee-45aa-8b60-9d0bc22a1717