I agree with this. Playing and building for years with NWN and its Aurora Toolset, I fell in love with colored lights that can create green swampy mood or set player right in the fiery hell. Futhermore, with the conjuctions of "transparent" dynamic lightning discussed somewhere on this subforum we can create really beautiful maps. Remembering (again) NWN and Toolset, level designer could add some color to the area itself, making it a lot different from "default" terrain. Can we also have some slight tints on the page settings which can, for example, make highlights (bright places with high RGB values) yellow, or all tones red, or shadows (low RGB values) blue. It would be the heaven for anyone who love atmosheric campaings. My last suggestion is not about light, it's about sound. Also represented in Aurora, sound can be played randomly. Map designer placed sound on the location (in Roll 20, add from Soundcloud), set loop property (represented on Roll20) and set up some delay, for example from 30 to 120 seconds. Voila! We have a short sound that plays randomly without constant need of DM to play it or to make an annoying loop. In a big cave or a city you can have dozens of that sound played randomly: bats, dogs, rock falling, zombie moans, city bells, flies, water drips, yelling herald, etc. Additional features can include automatic pitch and volume variations, various effects like echoes and much more. Believe me, I played classic PnP modules with those sweet features alot, it gives huge immersion boost to the players and DMs alike.