Head cutaway animation - possible? I've got a possible job coming up for our university for the language department where they'd like a cutaway of a head to see how the mouth and tongue work with word sounds. Kind of like this https://www.youtube.com/watch?v=Gsgv1m1a0Sc&amp;index=3&amp;list=PL5FCB12D7F83D2133 but in 3d so that the camera can rotate around the head but keep that simple cutaway look (ie solid walls and empty space not like this https://www.youtube.com/watch?v=KPEBlP2cbIQ&amp;index=4&amp;list=PL5FCB12D7F83D2133 since it's way too busy in look). I know the camera clipping plane kind of does this but doesn't keep that walled look.

Not sure how to approach this, any tips?
You could set a background image and trace the contours using extrusion modelling (I startet with a plane).



After that you would add a few Shape Keys for all animated parts:



Add key frames of the Shape Key's values RMB with mouse over the value slider.

Quick result:



To finish you would extrude the flat model and perhaps add a bevel modifier.