"Convert to ShaderMaterial" doesn't work for X-Ray Stencil Mode.

[HauntedBees]

Tested versions

• Reproducible in v4.5.beta1.official [46c495c]

System information

Godot v4.5.beta1 - Linux Mint 21.1 (Vera) on X11 - X11 display driver, Multi-window, 2 monitors - OpenGL 3 (Compatibility) - NVIDIA GeForce GTX 1070 (nvidia; 535.230.02) - Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz (4 threads) - 31.30 GiB memory

Issue description

The new 4.5 stencil option for materials allows x-ray functionality. If you convert a material with this behavior to a ShaderMaterial, the generated gdshader will not have the same behavior.

Steps to reproduce

1. Create a new MeshInstance3D and assign a StandardMaterial3D to it.
2. Change the Stencil > Mode to X-Ray.
3. Right click on the Material and select Convert to ShaderMaterial.
4. The X-Ray effect no longer works.

Minimal reproduction project (MRP)

The example scene depicts two otherwise identical sphere meshes, both created with StandardMaterial3D materials with X-Ray stencils. One of the materials was converted to a ShaderMaterial but is otherwise unchanged.

stencil-example.zip

[beicause]

This is because the materials in next_pass will be lost after converting to ShaderMaterial. As a workaround, you can save the next_pass materials and convert them individually.

[HauntedBees]

This is because the materials in next_pass will be lost after converting to ShaderMaterial. As a workaround, you can save the next_pass materials and convert them individually.

I didn't create a next_pass material, though. Does the Stencil mode create a hidden next_pass material on its own?

[beicause]

Stencil generally requires next_pass to work. When selecting the XRay or Outline presets, it will automatically create a next_pass material for you.

[HauntedBees]

I see, thank you! Checking the example project now I can see the next_pass material. Maybe I missed something, then, or this might benefit from some clearer documentation, as I don't think any other shader settings create new next_pass parameters without telling you.

But I'll close this ticket, since there's seemingly no issue functionality-wise after all. Thank you for your help!