Interestingly, there are LaTeX packages for coffee stains[1] and to simulate the variability of an actual typewriter[2]. I suppose both of these involve discret

Interestingly, there are LaTeX packages for coffee stains[1] and to simulate the variability of an actual typewriter[2]. I suppose both of these involve discrete objects (the coffee stain, individual characters) and photocopy/scan effects involve 'fuzzing' of the whole image, rather than any particular element, and TeX isn't really set up for the former. [1] http://hanno-rein.de/archives/349 http://hanno-rein.de/archives/349 [2] http://mirrors.concertpass.com/tex-archive/macros/luatex/latex/typewriter/typewriter-guide.pdf http://mirrors.concertpass.com/tex-archive/macros/luatex/lat...