How to access the screen texture inside a SubViewport?

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1

Godot Version

4.4.1

Question

I am trying to implement a 2D multi-pass shader which is using the screen texture as an input via hint_screen_texture. The first pass of my shader is working fine until I move it inside a SubViewport. Then the screen texture is empty.

Am I missing something or is there another way of implementing a multi-pass shader using the screen texture as an input?

2

The subviewport is its own context, so you would need to duplicate anything you did for the main viewport. That is my inclanation at least…