Bret Victor, visionary software designer and purveyor of impossible dreams, recently delivered a keynote at the Canadian University Software Engineering Conference.

A video of the talk is now available to all.

It’s an hour that flies by with beautiful software demos and an impassioned message about pursuing your creative purpose.

Bret used to work at Apple, where he was sort of a one-man dream factory for experimental user interface concepts. He also produced the interactive info graphics for the Al Gore book for iPad, Our Choice.

Anyway, this is good stuff, but the reason I arose from the ocean deep to blog about it is that I’ve done some original art that features in a couple of Bret’s demos. There’s one with a tree:

Consistent with my usual working method, I first produced an inappropriately dark and moody version (David Hellman blog exclusive):

And these:

There is even a Braid cameo in there.

So go ahead and watch Bret’s talk. It’s great.