No, not short. That's longReddScorn wrote:
in short:
- you use only HD elements and play HD = HD elements are used
- you use only HD elements and play SD = default elements are used
- you use only SD elements and play SD = SD elements are used
- you use only SD elements and play HD = SD elements are used
That's pretty much it.
- you use SD and HD elements and play HD = HD elements are used and missing stuff is taken from SD stuff instead of default
- you use SD and HD elements and play SD = SD elements are used and HD elements ignored.
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osu! doesn't scale up SD elements if you're playing in HD because the outcome of "that" behaviour would be horribly ridiculous. Therefore, the 4th situation will happen. (and ignore everything else in the list for this case)