In Life After Rendering, we demonstrate how to use a little-known element of Daz Studio. Canvases.
Canvases are to digital art, what layers are to a digital illustration or picture, and the best part? You only need to render your image once and then you can change the light intensities in Post-Production, whether you're using Photoshop or GIMP, or some other photo processing app. Wait? What? Did you say, render the image a single time and THEN change the intensities?
Yep. That's the power of DS Canvases.