We're putting all single pieces of art at 1k. While pinups can definitely be time consuming, 1 image = 1k is the generally accepted exchange standard for art regardless of quality so we're sticking with it wherever it seems to apply (Not doing so would make it a bit too unclear exactly how much credit people were getting when they did a submission, even though it means some things are definitely uneven from medium to medium). The only art type so far that's going above 1k is maps due to the research requirement, and that will only be 2k even for the most detailed and complicated map.

Thank you for the input though!