I think it depends on the show as to how many layers you need. For our show here in Austin, it has to have three layers except for wearables. We have a large group of art quilters here and no one has complained, at least not to me about needing to have the batting. I do know that some times at Houston I see quilts that you can see through so they have no batting in at least part of them.
Frances in Austin where it was in the 80s on Saturday and maybe the 50s yesterday.
Okay - I'm really, really new to this...coming into art quilts from a decorative artist background - murals on canvas, frescoes, etc. And I look at the various requirements listed for different exhibits or competitions and am confused. Quilt National says at least 2 layers required, so it sounds like the batting layer can be left out (thank goodness!). Other venues aren't clear at all about requirements, and still others seem to want the 3 layers. Is there anything specific about art quilts? If you exhibit in a traditional quilt show, do you have to meet the 3 layer requirement?