I can't add a shader to the model.

[Zenitsu295]

I imported a VRM model and wrote a simple shader for a dithering effect, but when I try to use the shader, the character's texture disappears. I think I need to find a Next Pass slot and add it there, but I can't seem to find it.

[fire]

What version of godot and what is your system?

[Zenitsu295]

It's Godot 4.4.1 and I'm using Windows 10.

[lyuma]

If you want to modify the material parameters of the imported VRM model, make sure to extract the materials by double clicking the vrm model and go to the Actions menu in top left and extract materials. Then, you can assign your shader in the "next pass" slot of the VRM material. For vrm materials with an outline, there will already be a next pass for the outline shader, so you need to add your material as a next pass of the next pass. Note that the Next Pass box may be below the VRM shader properties rather than above them due to how the inspector is designed. Or, you can expand the inspector under Geometry Instance and add the dither as a Material Overlay, which will apply to all surfaces on the mesh. If you are still confused, I would look at some godot tutorials for modifying materials for imported models and next pass. Finally, it might be good to consider the optipn of modifying the mtoon shader itself to add your dither effect into the main rendering pass. Often, it does not work well to use additional rendering passes for things that are better done as lighting effects in the main shader. Just wanted to mention that modifying the base mtoon shader is sometimes the right thing to do. This is your artistic choice: the default mtoon shader is merely one default artistic vision, not the only way to do shading. Hope this helps.

[Zenitsu295]

Thanks! It seems like the Material Overlay worked. However, I’m just starting with 3D and shaders, and I want to understand something. Right now, even though dithering works well, as the alpha value increases, the model turns white (I want it to became transparent instead of white). Is this possible for VRM models? Is this happening because I’m using Material Overlay?