Research the shadow sprite to determine how it's used exactly

[rdw-software]

Obviously there is some information, but a lot isn't quite clear:

• It appears units use differently-sized sprites, the exact dimensions for which are taken from... somewhere?
• Is the transparency always the same?
• Do all units (monsters) actually have shadows?
• Are there conditions where the shadow sprite won't be rendered? (I know players don't have one when sitting, for example)

These are just some of the questions that should be answered in the ACT/SPR articles, or possibly in a separate document that can be referred to. Also TBD: is that all there is to know about them? Is it even correct?

[rdw-software]

This should cover the scaling applied to the shadow sprite (point 1): https://gist.github.com/Duckwhale/60557120b0d0741bc982a148278f1193