Any way to blit one texture to another?

Help
1

Godot Version

4.5

Question

Hi. Is there any cheap way to blit (copy) the content of one texture to another. For example, copy the content of current frame buffer from main root viewport texture to an arbitrary temporary render texture to be used as an input for certain full screen animation effects.

I tried searching the docs and

2

Best to use sub viewports.

3

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