Some recent AMD video drivers have been causing problems with Vulkan. If you have an AMD video card and the level geometry doesn't render (mostly black or blue field screen), try updating or rolling back your drivers, or playing in OpenGL mode. For me, this seems to be resolved with the latest drivers (25.11.1), but I will update if I encounter any further issues.

Screenshot of the issue:

https://imgur.com/a/3jIZGsh

More details here:

https://github.com/godotengine/godot/issues/109378