Topic on User talk:Mrtnptrs
Jigen123 (https://discord.com/channels/165183350913499136/326048443040530432/1075914761537073282): "It has already been discussed in the past and pictures converted to .png should be avoided for both covers and screenshots. .pngs, even converted ones, result in better humbnails, sure, but letting people just upload converted .jpeg discourages editors from searching and uploading actual uncompressed .pngs"