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I've never tried using the "emissive" property of uberlights so I thought I woulf give it a try.
I think you may have overlooked an important feature of the light.... Falloff.
Like the ambient channel, it is off by default and the start and end points are set to "0".
Glow and the 3 LED lights were made emissive and left at 100%. They are the only lights in the scene.
In the first image, Falloff was not turned on. In the second image, Falloff is turned on and the LED end point is set to 300 with the glow set to 1000. The third image has glow end point turned down to 500 and in the final image, I added an AoA ambient light at 5%.
I only changed the Falloff end but you can also change the Start and decay value for the light so there is a lot of flexability here.
In all the images, the "emissive" ambient remained at 100%.
Good stuff, Gone! I hadn't looked at all of the possibilities, but you're right. I was just playing with falloff Start, End and Decay, and it does add another layer of control with new and different shadows. I was having trouble getting it darker for that creepy look. Falloff with a low End value fixed it. I used your suggestions, and experimented with falloff End values of 100, 300, 500 and 1000 for the glow.
I didn't save all of the tests because I only rendered about 25%...just to get a look at it.
This one has a glow falloff of 300, and 100 for the 3 LEDs. I didn't add AOA's Ambient light, or the additional lights that came with the set.
It's a little grainy. I left samples at 80. May need to bump that up some.
Bumped samples to 128. Grain much better.
Added one of the light sets that came with the package. Granted it's different, but "is it better"? I guess it just depends on what look you're going for. The shadows seem darker here.
No post work in any of these last few images.
I wish I had seen this thread months ago as I made this some years back Tutorial Uber Area Lighting: The Basics
Hey Pete,
Thanks for stopping in. I only started this thread in the past 2 weeks because I couldn't figure out how to turn the lights on in these hallways. Richard pointed me in the right direction, and a few others chimed in and voila! The lights are on! Been running a few tests..
And yes, I worked my way through your tutorial a while ago. Very helpful! But I didn't remember anything about making emissive surfaces in 3DL. As I learned about that working with Iray, it now makes sense working with 3DL.
sweat