@pricklypixar: Both Crowds and Sim tend to be more on the technical side, I’d say. The issue with “I’ve been a generalist” as a statement is that thousands of people are able to say that and you’ll have a much harder time convincing people that you are great in many areas, than convincing them that you are excellent in one very specific area. This is universally true, not just for Pixar or computer animation. Many people get hired for one specific skill set, and then after a project is done switch over to other projects which, in many cases, are quite unrelated to the original project or department (I was such a case eventually).
If I wanted to apply for a crowds position, I’d probably go and build some scripts/tools that simulate crowds behavior (Craig Reynolds’ stuff [1] is a good start to look at, for example) and run those on a few dozens/hundreds/thousand agents, and perhaps even apply this logic to some animated characters. Having good knowledge and taste about animation, lighting, shading, etc. is a very good and useful and perhaps necessary thing, but if you apply for crowds, it’s probably a good idea to demonstrate specific knowledge in crowds.
For Sim, it’s probably an advantage if you have some background in numerical mathematics (finite elements, linear/nonlinear solvers, etc) but at the same time can demonstrate what a good sim has to look like, what typical problems are (i.e. beyond setting up) and how you solve them.
But then again, both departments contain more artistic people as well, I don’t quite know what the scope is on that end of the Tech/Art spectrum. The work in all departments tends to be more tech-oriented in early stages of a movie, whereas in later stages you might be doing more shot work. So, depending on where you place yourself in the spectrum, they’d put you in an appropriate spot.
(Obviously, that’s all my personal opinion and limited experience, especially on the more artsy side of things.)
Makes sense?
[1] red3d.com/cwr/steer/
PS: Come to think of it, I know at least one person who, as far as I know, has not focused too much on programming, started as a Crowds TD and is now in Sim… but he had an artistically very strong demo reel with some crowds shots, which after all might be the most important part of your application.