Godot 4 dynamic material export produces depth_draw_alpha_prepass which doesn't compile

[markeel]

Material Maker version: v1.2p1

OS/device including version: Linux/Ubuntu 22.04

Issue description: Expected to export shader that would compile in Godot 4.0

Steps to reproduce: Use the ptex file below and then do File->Export Material->Godot->Godot 4.0 sample.ptex.txt

[poiati]

Experiencing the same issue on Windows.