No casing

I have two trays of PanCyan TTBVI that I put S2B on Feb 15. Today, I opened them up to fruiting conditions, and the trays look beautiful. But, I don’t have any sterilized casing prepared. I could make some tomorrow, but how necessary is it? My setup uses bubbler tubs, so the temp, FAE and RH are dialed in. Will Pans pin without the casing?