Unreal Lightmass vs Autodesk Beast

[Jason Amstrad]

The Unreal Lightmass technology,is that based on Autodesk Beast ?
I mean are they using Autodesk Beast and then they give it another name called Unreal Lightmass when they use it in UDK ?

In the case that it is not based on Autodesk Beast , then which one do you consider to be the best, Lightmass or Beast ?
And which one gives better optimization(s) and performance ?
And which one uses the best algorithm,Lightmass or Beast ?

[mktwo]

It probably comes down to how you use either of them. Sure, Beast did a great job for Mirror's Edge for example, but I've seen some things done with Lightmass that are almost just as impressive.

And of course, Lightmass is free, Beast isn't (right?).

[Spoondog]

Lightmass is a lot faster to build and looks better from my experience (not to mention integrated more nicely).