Technical: Tron Chromatic Aberration

I recently watched Tron and what impressed me most were distortion flares and chromatic aberration.
Watching film trailer You can realize it`s no regular aberration. And at first glance there`s no easy way of achieving this in layer based compositing software like AE, node based thing like nuke is necessary. Looks like it may involve object normals and different phase of motion vectors for each color channel.

I guess it would look best if it was possible to renderout a single frame for different color channels in microframe timephase based on fading of vignette like gradient, but I`m not sure.

Tip of the day:
Expressions are very important. Learn to use them, improve quality of your work.

Website of the day:
http://en.wikipedia.org/wiki/Chromatic_aberration