Trying to figure out how to fix the lack of mipmaps on ViewportTextures in no signal in Godot 4.2.2. Unfortunately, it appears that Godot does not generate mipmaps at all:

Calinou:

Mipmaps aren't generated for ViewportTexture, so I think this is expected.

There's an open issue for the fact that the "generate mipmaps" setting is ignored for ViewportTextures in Godot 3 (godotengine/godot#23417) and there is no such setting in Godot 4.

Naively attempting to use Image's generate_mipmaps function is much too slow as it makes the game's framerate very choppy.