Hi, sorry earlier I'd replied on my laptop so wasn't able to give specifics from DAZ.

In DAZ 4 or 4.5, select the lights and cameras tab, and select the UberEnvironment from the scene panel. Under presets there should be some presets for UE and you'll see ones like "Set Quality 0XLo", "Set Quality 1Lo", etc. I've usually used the 4XHi preset but it will punish your rendering times so I'd stick with the low quality settings while getting everything right, then crank it up for your final render.

If you're not using the Smart Content or are in DAZ 3 (which I've not used), they should be in your content library under Light Presets -> omnifreaker -> UberEnvironment2.