Additive not subtractive

[Dubbler]

i watched the new gears editor vid and have been taking a look at the maps being created on the web and im wondering if they changed the way that lvl creation is done in UE3 from 2. is it now a additive system and no longer subtractive? its cool either way, it just makes me wonder if skyboxes are done the same way or if its a whole new way to create.

[Molkien]

You can do both now. Although almost every map I've looked through is additive.

[NeoNautica]

There are no skyboxes now like UT2003/2004. The sky dome (or sphere) is placed in the level and scaled up to be very large so it surrounds the level.