Viera, who also composed the film's lovely ambient electronic score, explains:
CALDERA is inspired by my father's struggle with schizoaffective disorder. In states of delusion, my father has danced on the rings of Saturn, spoken with angels, and fled from his demons. He has lived both a fantastical and haunting life, but one that's invisible to the most of us. In our differing understanding of reality, we blindly mandate his medication, assimilate him to our marginalizing culture, and entirely misinterpret him for all he is worth. CALDERA aims to not only venerate my father, but all brilliant minds forged in the haunted depths of psychosis.
Full credits here.