They remind me of Markus Reugel's work, though Reugels' is more delicate, and Heinz Maier.
He won't reveal his actual process, but he says it takes months of prep and experimentation to get it just right, and then just a second with a flash to capture the images.
And no photoshop.
They look like glass sculptures.
Admirable. Incredible. Enviable.
More on his Flickr account.