I am struggle with some lighting issues.... as in, I am not sure wtf I am doing.
So, my intention: Library like room with huge windows and a sky light. Some candles around room, but it is day time noonish so there should be a shit ton of light coming through the window...
I thought I might just be able to crank up the environmental light in the render settings... but it didn't really work like I wanted. So I put a spot light outside the main window... still not what I want.
I would think that a window that big at that time of day with clear skies would light the crap out of that room... almost so that the candles would be "dim" in comparison.
Here is a screen grab for what I have... any help would be greatly appreciated.
PS
Apologies for the large image, but I wanted you to be able to "see" my settings to see if I am on track
>I would think that a window that big at that time of day with clear skies would light the crap out of that room... almost so that the candles would be "dim" in comparison.
You might think that, but actually that is your eyes and brain playing tricks on you - human (and animals i guess) vision is generally very good at adapting to different light levels quickly, so much you don't really notice just how different the light level is when entering indoors from a brightly lit exterior. As an experiment, next time you are in a normally lit indoor room with a window on a sunny day, stand by the window, look around inside for a while, and then quickly turn and look outside - you will notice yourself squinting strongly, narrowing your eyes to reduce the amount of light coming in until your irises change size.
here's a quote from some random science paper "While the range in which the human eye can operate spans approximately 10 orders of light intensity, the perceived brightness of an object depends on the intensity of the surroundings." to prove something or other and confirm the existance of my giant wang.
However, leaving the physiological/psychologiclal question aside, as an
artiste you want to achieve a certain effect in Daz Iray, which is why you are asking questions
So, here is an answer:
I was going to say you need to add a "Iray Light portal" at the window. A light portal is a "iray engine hint" that tells the engine to send a bunch of render rays through a certain plane. And maybe it will work!
But then after some googling this thread (
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) suggests you may be better to switch from using a HDRI environment dome to instead try a Sun-Sky setup with the sun positioned to come through your window at the correct angle, and then use tone mapping to get the level of brightness you want indoors.
Because Iray simualtes realistic light properties, if the indoors is bright enough, then the window area will probably be overexposed (too washed out). If this is a problem and/or you want to see "blue sky" through the window, you would need to do a second render with your chosen HDRi dome image and then photoshop the less bright window area into the main image with your brightly lit interior.
Note also if the sunrays falling in through the window should be visible, you should look for the "god rays" product, or google some tutorial on how to simulate the volumetric lighting yourself (I think sickleyield has one)