Just recently out, Rango is and was one of the most visually interesting movies I have seen ever. What is most interesting about Rango, is that it walks the line between film and animation, realism and abstract and technology and art.
All the shot were first shot with the live-action actors - no motion capture involved. This gave the film a much more fluid basis for the acting in the animation. Having all the characters in one room interacting also allowed for interesting ad-libs and character development. Instead of having a lone animation in a room shooting footage of himself, the animators had a rich resource of the acted shots from all angles, allowing them to scruntinise every nuance of the performance.
Gore Verbinski appraoch ILM with the pitch and ideas, having previously worked with them before on Pirates. What's interesting however, is that ILM is primarily a CGI and effects company and this was their first animated feature. Approached from a cinematographic view, rather than traditional animation - this movie was shot as though it was filmed allowing for its unique visual style.
The blend of characterture and realism is another interesting angle in the film. Each character is rendered to loving realistic detail - but it's obvious that they are charactertures. Visual liberties has been taken with the design and origins of the characters. The characters were developed by a host of concept artists, but the final pass was always through artist Crash McCreery - which gave unity to the look and feel - but allowed for all the ideas.
Character Illustrations
Here is a little teaser of the "making of". The behind the scenes on the Blu-ray version of the film is much richer in content but this clip will suffice for now. :)
"Making of Rango"
A great insight into the art of the movie can be found at: http://www.pixologic.com/interview/rango/1/