How do I use real world lumen values under emission surface settings, in DAZ 4.20?
vozolgant
Posts: 207
in The Commons
In older versions of DAZ, under Tone Settings, I set Exposure value to 1.0. Then I'd then pick lm as the Luminance Units under emission surface properties, and I could put in real world lumen values.
See these values? I could input these and get accurate results, but not in DAZ 4.20. Something changed.
Can someone help me figure out how to setup a scene in DAZ 4.20 to use real world lumen values under emission surface properties?
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Comments
What is your emitter? Iray has been chnaged as the previous behaviour, not adjusting luminosity for opacity as long as it was non-zero, was physically incorrect. If your emitter has a Cutout Opacity less than 1, or has a transparency map to mask out a flame decal or the like, then the effective area of emission has been reduced but you are setting the emission for the whole surface, including the areas with reduced strength, and so the overall light level is reduced.