Could you please find an alternate hosting site for your art as per the posting instructions (http://c-im-bigbang.livejournal.com/14560.html)? There's a very specific reason that the rules DO NOT allow tumblr as the primary place to store art and fic, and that's because (as many people are in the habit of doing frequently) changing tumblr URLs obliterates existing links, making stuff impossible to find in the future.

If your artist doesn't have a LJ/DW/Ao3 account, we can make a permanent post for them using the cap-im fest account. This option has been available and advertised to people for several weeks.

-your moderators