I made a set of screen-transition shaders and a small change_scene wrapper for Godot 4. The short clip is a hard cut vs the same scene change with a transition, real render, no editing tricks.
Free Lite (4 transitions: circle wipe, iris, linear wipe, pixel dissolve): Screen Transitions Lite - 4 Free Transition Shaders for Godot 4 (full pack: Screen Transitions) by inkharbor
Demo clip: https://youtube.com/shorts/Oqq-EVuzDdk
The full pack (16 transitions) is on my itch page. Feedback on which transitions you would want next is welcome.
Code and text were written with AI assistance.