Adding Light in the NightFor starters, the windows will never light up if we don't mask out the darkness from them. Hold the "Ctrl" key and click on the window illumination layer; this will automatically select the transparency of the windows. Pretty nifty huh, you didn't even have to save an alpha mask of the windows to do this. With the new selection and the dark layer active, add a layer mask to the dark layer. The lighting on the windows should now come alive. However, the windows are not the only things that need to be lit up; the fire is blowing out the windows and will also light up parts of the exterior structure and surrounding foliage. Deselect the windows and use a soft black brush at low pressure to paint light into the dark image (you are actually just revealing the orange/tan image hidden below). Mask out more where closest to the fire and less the farther you get from it; using a speckle brush will allow you to add lighting details to foliage and fallen leaves. Mask shown on green background for clarity: Here is the image as you would see it: