You may be thinking of the bad old days when over-driving the ambient was the only way to fake area lighting.
GI plus any standard material will do it. It doesn’t even have to be an ubersurface!
In the new area lights (DS4.5), the diffuse, ambient and opacity channels are still there but they really should not be.
...and setting a bright ambient can actually alter the intensity you’ve set, you’ll get an unexpectedly bright light unless you’re watching out for it. I’d recommend turning those channels off completely.
Thanks for the reply but no I am not confused..well not about this one at least.
GI and ambient surfaces, yeah I know as the link above shows.
I don’t know what you mean by “In the new area lights (DS4.5), the diffuse, ambient and opacity channels are still there but they really should not be”.
Increasing Ambient surfaces on a Default surface will only make a scene brighter when you use Global Illumination…I have never come across a situation where that varies.
But we are getting away from the original question which has been answered now so thank you everyone for your input and help.
Now to get this tut finished and posted.