Strange Anti-Aliasing effect

[JiaoJianing]

I brought the problem from cesium community, I don't konw whether this is a bug.

https://community.cesium.com/t/strange-transparent-and-anti-aliasing-effect/19246

[sanjeetsuhag]

Hi @JiaoJianing. Thanks for bringing these issues to our attention. From the community post, it seems like there's two separate issues here. Would you mind creating a new issue for the transparency one and adding some more description here? Thanks!

[JiaoJianing]

OK. This is the live demo
By default I use 4x MSAA plus fxaa.
and the question is:
When I enable log Z buffer, some strange lines appear：

after disabling log Z buffer, it looks good:

Could someone to explain this?

[ggetz]

I wonder if this is at all connected to the precision issues we're seeing in the depth buffer, particularly when log depth is enabled: #10106 (comment)