Blocky artifacts appears when a transparent mesh has overlapping regions

[mysticfall]

Godot version:
master / 8b231b9

OS/device including version:
Manjaro Linux 18.0.3 / Nvidia GTX 970

Issue description:
I have a hair mesh that contains overlapping plane regions. But when I setup a material, there appear blocky patterns on certain areas as shown in the below screenshot:

The material has culling disabled, and depth draw mode is set to 'opaque pre-pass'.

In case it's something difficult to fix, any tricks or workarounds to mitigate the problem would be appreciated also.

[akien-mga]

Can you still reproduce this bug in Godot 3.2.1 or any later release (e.g. 3.2.2-rc2)?

If yes, please ensure that an up-to-date Minimal Reproduction Project (MRP) is included in this report (a MRP is a zipped Godot project with the minimal elements necessary to reliably trigger the bug). You can upload ZIP files in an issue comment with a drag and drop.

[clayjohn]

To add to this, the only issue I can see is a small amount of z-fighting.

[akien-mga]

No answer, so closing. Please comment if you can still reproduce the issue in Godot 3.3 or later.

[Calinou]

Note that for hair rendering, you can use alpha-to-coverage, alpha antialiasing and alpha hash in 4.0: #40364