When importing a png with compress to vram, it gets converted to DXT 5, which is 8bpp, not 16. You can try enabling etc2, or the other formats in the project settings/rendering/textures/VRAM compression, and try the various import options.

[iloverumi9]

When importing a png with compress to vram, it gets converted to DXT 5, which is 8bpp, not 16. You can try enabling etc2, or the other formats in the project settings/rendering/textures/VRAM compression, and try the various import options.

Or use the settings you found.

Or preconvert the file and give Godot a format it won't convert like DDS, or a format that supports 16-bit like exr.

Originally posted by @TokisanGames in godotengine/godot#58012 (comment)