Dan Hollick explains the science behind making realistic shadows and recommends the Beautiful Shadows plugin that takes care of this for you.
What makes a shadow look realistic?
— Dan Hollick 🇿🇦 (@DanHollick) August 9, 2023
Well, there are essentially two parts to a shadow: the fully occluded part (Umbra), and the partially occluded part (Penumbra).
Ideally, you need at least two layers of drop shadow to mimic these. pic.twitter.com/fJ7NgiMJKg
Dan Hollick with a fascinating thread on an optimal x‑height size and a visual arc.
Why are some typefaces harder to read than others at the same font-size?
— Dan Hollick 🇿🇦 (@DanHollick) March 16, 2023
Well, it has a lot to do with x-height but of course it's a bit more complicated than that: ↓ pic.twitter.com/QElNG1aq7q