Why does this even work though? WEBP and PNG are very different file formats yet for some reason this has always worked for me as well. Is windows automatically converting the files? I haven’t checked if changing the file extension changes the file size.
Not sure why most games cant/dont do this, but i’ve seen Minecraft shaders use temporal upscaling exclusively on the clouds, reflections, and shadows. while using fxaa for the rest of the image.