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Currently the wiki is set to generate thumbnails with a jpeg quality of 80 for jpeg source files. While this saves somewhat on bandwidth, the image quality suffers with the thumbnail being covered in visible jpeg compression artifacts. This can be especially distracting for screenshots of in-game menus where compression artifacts stand out from an otherwise smooth background. Compare the original to the current thumbnail: [compimg]http://pcgamingwiki.com/images/4/49/Hamiltons_Great_Adventure_-_Cover.jpg|http://pcgamingwiki.com/images/thumb/4/49/Hamiltons_Great_Adventure_-_Cover.jpg/282px-Hamiltons_Great_Adventure_-_Cover.jpg|282|402|q98|q80 - Wiki thumbnail[/compimg] JPEG artifacts are visible all over the image, mainly on Hamilton's shirt and collar, on Sasha, and in the black area around the letters on the bottom. Increasing the quality to q93 using Irfanview removes all visible compression artifacts at the cost of double the filesize: [compimg]http://pcgamingwiki.com/images/1/19/Hamiltons_Great_Adventure_-_Cover_q93.jpg|http://pcgamingwiki.com/images/thumb/4/49/Hamiltons_Great_Adventure_-_Cover.jpg/282px-Hamiltons_Great_Adventure_-_Cover.jpg|282|402|q93 - 75 KB|q80 - 38 KB - Wiki thumbnail[/compimg] The increase in filesize would be less for images with less visual complexity, such as screenshots of in-game menus. For completeness, here is the difference between q98 (original) and q93: [compimg]http://i.imgur.com/E0oQOxw.jpg|http://pcgamingwiki.com/images/1/19/Hamiltons_Great_Adventure_-_Cover_q93.jpg|282|402|q98|q93[/compimg] The difference is almost imperceptible. I suggest a quality of somewhere between 90 and 93 as being a good tradeoff between visual quality and filesize. Note that q93 might be slightly different for media wiki than it is for Irfanview. Some trial and error might be needed.