What usefulness does having image views of particular mip levels have?

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I know you use mip levels to reduce aliasing effects, but that's done at the sampling level. Let's just say you were only interested in using mips 3 and above you can control that with the sampling. Vulkan offers the choice of selecting image views by layers with base array layer and layer count, and base mip level and mip count. What uses does this have? For example does it have uses for selecting one particular mip, or selecting multiple mips from a certain level onward?

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