Even if posted more than once on hacker news, there is a interesting forum post [1] from Lucas Pope, the author of Obra Dinn, describing dither mapping in 3d. [2] (2017) has some more links
[1] https://forums.tigsource.com/index.php?topic=40832.msg136374... [2] https://news.ycombinator.com/item?id=15766249