Topic on Extension talk:OpenBadges

I created badge and issued to myself. On ViewBadge page it seems it was working fine. But I don't see any customized text on badge. I used Hexagon.png, I thought something should be written on badge? Or it doesn't do it? Please advise.

Also it seems it gets badges from mediawiki common list, how can I use my own png graphic for badge.?

Late reply but left here for future readers. No text is added to the image. Instead a separate image needs to be created and locally uploaded for each badge.