Black Ice is harder for me to interpret than Mothlight, especially I have absolutely no idea on the process of making, or any kind of hint to what Brakhage explored with this one. There is an overwhelming quantity of black, with some kind colored patches that are revealed by the "melting" of the black mass - quite possibly, this is where the title comes from.
The whole piece is in continuous zooming motion, or at least this is the impression I've had. Nothing new after sitting for hours in front of screensavers, but in a way it evokes just the same kind of feeling. I really liked the very intense colors but the perceived forward motion that is endless made it more difficult to focus on the actual structures and there form. There was a sense of a black center and a more vivid outer region, where the colored patches form. (In memory anyway)
Too early, to get a good interpretation - maybe some more re-viewing.