If “Carne y Arena” was a film, it would be a short, harrowing one. The touring virtual-reality exhibition, which debuts at Aurora’s Stanley Marketplace Oct. 23-Jan. 30, 2021, is a 20-minute work of art-meets-technology that deliberately bleeds comfort for the sake of empathy. But, of course, it’s not a film, nor is it a gallery exhibit or immersive, Meow Wolf-style experience — though it shares elements with all of those. If you go “Carne y Arena (Virtually present, Physically invisible).” Virtual-reality art exhibition running daily, 8 a.m.-10 p.m., Oct.