Extremely niche pet peeve: inconsistent light sources for cast shadows in Android iconspic.twitter.com/4h8DHLwpj9
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But why are you calling for 3 different standards?! :)
STYLEGUIDE STYLEGUIDE STYLEGUIDE
Seems like developers all have their own, idiosyncratic, light sources. Some think the sun shines out of one place, others another....
<obligatory XKCD about standards/>
A standard for standards. They exist.. ISO a good start.. or red means go and green means stop..
but but material was going to solve everything
Obligatory relavent XKCD link https://xkcd.com/927/
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