their pages:
https://rentry.co/ccedit
https://catbox.moe/c/h3yc3o
https://e-hentai.org/uploader/concor
links to ConCor's smegma art studies and resources
ibis Paint X timelapses
https://desuarchive.org/d/thread/11339992/#11345283
https://desuarchive.org/d/thread/11339992/#11346035
https://desuarchive.org/d/thread/11339992/#11346138 (angelauxes art study)
https://desuarchive.org/d/thread/11339992/#11347327 (angelauxes art study)
https://desuarchive.org/d/thread/11339992/#11352367
https://desuarchive.org/d/thread/11339992/#11354955 (editing someone else's smegma as a demonstration)
https://desuarchive.org/d/thread/11339992/#11357500
https://desuarchive.org/d/thread/11339992/#11365933
non-smegma ibis Paint X timelapses
https://desuarchive.org/d/thread/11339992/#11349746 (tummy punch bruising)
honeybread, lewdcromulo, and pondbs art study
https://desuarchive.org/d/thread/11339992/#11346054 (the text in the post is also their ranking a list of artists by the difficulty of drawing their smegma)
resources
https://desuarchive.org/d/thread/11339992/#11348034 (perspective demonstration)
https://desuarchive.org/d/thread/11339992/#11362455 (color theory demonstration)