Wikimedia Developer Support

What determines thumbnail sizes?



Two wikis which are ostensibly setup the same way have different results when it comes to thumbnail quality and the sizes available by default.

A vs. B

Neither site had $wgSVGConverters set so I tried setting that to ImageMagick on B with no change in results.

But there are two problems (which are probably related): quality; and the default set of thumbnails created. Whereas A offers

Size of this PNG preview of this SVG file: 512 × 512 pixels. Other resolutions: 240 × 240 pixels | 480 × 480 pixels | 600 × 600 pixels | 768 × 768 pixels | 1,024 × 1,024 pixels.

B only offers a couple resolutions.


$wgImageLimits is the list of sizes offered for download, and $wgThumbLimits determines the actual thumbnail size.