Irrlicht Engine

I have posted a question on google answers, with a pricetag of $15. Essentially, I want to know what the best graphics and physics engine is for a particular project.
http://answers.google.com/answers/threadview?id=748869
If anyone can help me out, it'd greatly appreciate it.

Thanks,
RR

That depends a lot on how do you want to interact with the app to do that. If you don't want to code or script and just want to use Autodesk to model a completely interactive physics environment then the only solution would be a engine that fully supports x3d or Collada specification (both are xml formats). Theres no engine that i know that reads Autodesk data directly so it would have to be able to export physics to one of these formats. I also don't know of any engine that fully supports x3d or Collada. Sorry.