Awesome, thanks for the reply. Quite an interesting setup - seems counter intuitive as sticking plane lights in windows appears to have been all but phased out in favor of more physically correct lighting setups, but your renders are amazing so obviously it’s still a good approach!
One last question, did you use a white color for the sun, or a standard colored sun and then adjust the white balance to get everything so white?
So to understand this correct, it’s just a low value sun for shadows, and a big square light outside the window for the fill? background plane I assume is not emitting light?
yes big rectangle corona light outside , little sun for shadows (diffuse) and 2 planes with corona light material 1- for visible and another to get some reflection and some adiction light with temp of the image.