Shader material with alpha prepass transparency not working

[Hannyson]

Godot version

4.0.alpha4

System information

Linux

Issue description

I created a shader material for a project with procedurally generated meshes, when I set the depth_prepass_alpha option in render_mode, the transparent parts of the displayed texture turn to black. With the others depth_ options, no problems. This depth_prepass_alpha option is what worked the best for my project when it was in 3.x versions.

Test Project : https://www.udrop.com/6pov/AlphaPrepassBug4.0.zip

Steps to reproduce

Create manually a shader with a transparent texture, a leaf for example. Set the render_mode option to depth_prepass_alpha.
https://www.udrop.com/6pov/AlphaPrepassBug4.0.zip

Minimal reproduction project

https://www.udrop.com/6pov/AlphaPrepassBug4.0.zip

[Hannyson]

Saw issue #59015, with depth_prepass_alpha AND depth_draw_* transparency works.

[Hannyson]

I did had this problem with a project converted from 3.4, after recompiling the shaders, by creating new shaders nearly identical to ancients and assigning them to the materials I use, the problem disappears. Maybe this was just a migration problem.

[clayjohn]

Can you still reproduce this issue in Beta13? There have been a lot of fixes to transparency that may have fixed this issue. I can't test as it seems your MRP is no longer available.

[Hannyson]

I haven't this problem anymore since a long time, I forgot to update this

[clayjohn]

Wonderful, great to hear that things are working for you now!