Lightmass is not working with me any more. It was working fine a few months ago, but not now. It takes forever, or when finishing, it doesn't show up lightmass results, just crappy lighting.

I installed older versions of UDK and drivers, restore points, but... nothing, nada. I've tried everything is on my mind, with no luck.
My specs are: XP (32), ATI Radeon HD 2400

Any clue?

Throw together a small test scene and upload it, I'll try and run it and see if it's a problema with your lightmass settings or your computer..

Actually, creating a new scene fixed the problem.

I think UDK May version made things went wrong (and it's slower) in my case. I stay with the April one.
Also, in the past, I did not need to add a lightmass volume, now it's a must.

In some way... Thanks!