Well the vibrib gameplay is mostly side viewed so most of the elements are just 2D splines in my opinion. However the camera can definately rotate around the main character as seen during breaks and inbetween tracks. So my bet would be that eveything is done with vectors/splines but within a 3d space. I don't think there…
Rendering menu > Effects > Environment and Effects dialog > Effects panel > Add > Add Effect dialog > Lens Effects > Choose Glow, and click the (>) arrow button. (that's from the Help file) In the options tab, turn on Object ID. The Object ID (G-Buffer) can be defined when you right-click any object and select Properties…