Currently a renderable texture view is a 2d or 3d texture view which arrayLayerCount is 1.

But using a 2d-array texture view with arrayLayerCount 1 in color attachments also be valid in D3D12, Vulkan and Metal. And by default, createView() without specifying a dimension on a 2d texture with more than one layer will create a 2d-array GPUTextureView, even if an arrayLayerCount of 1 is specified.

So 2d-array texture view with arrayLayerCount 1 also can be a renderable texture view.