Pictures in our community have following URL:
Can someone explain what is the purpose and which URL parameters are optional?
Thanks for the insights!
I don't actually know the answers to most of your questions but I can tell you that everything after the ID number can be dropped and the image loads fine.
Avatar crop dimensions are defined in your skin properties' "Image and Avatar Crop Defaults" section. I.e. your stage URL at
You could probably re-purpose some of the built-in avatar definitions to become a square one.