colymba/GridFieldGalleryTheme — pull request #8 by mi3ll (2013-07-25 06:01:45+00:00)
Title: FEATURE: Allow some customisation of thumbnail

I have not edited the CSS yet, so it won't fit well for items that use
different width and height, but you can now use PaddedImage etc.

I didn't have much luck with my quick look at the CSS...