I'm still confused, I guess. Are we having a window that opens into each art room? Because I don't think that would work well, to be honest.
See, I'm assuming that each of our rooms will have a specific atmospheric feel and theme to it, just as the different Ages have distinctive feels and themes. But the things that create the overall feel/theme/atmosphere of an Age or room generally involve the use of a set of specific environmental qualities, including lights, color palette, and emotional feel.
So in terms of the color and brightness of the lights and shadows that are used we have lighting like the pale blue/yellow in Teledahn, or the more shadowy feel of Eder Delin or the muted yellow and darkness of D'ni. Then there's the palette of colors; again, in Teledahn the main colors were blues, yellows, browns, orange browns, and greens. In Eder Delin the color cast included pink/red, brown, dark blue, and green. And in D'ni the color cast was mostly earth tones and yellow with dark colored art designs. Then there's the emotional aspect of the music and the ambience. Does a place feel ominous, mysterious, peaceful, curious, excited, evil, studious, cheerful, bright, lonely...? And even besides these factors, many other factors contribute to the atmosphere of an Age or room:
Technological vs. primitive
Natural vs. artificial
Colorful vs. dull
Dark vs. light
Organic vs. blocky
Closed vs. open
Ominous vs. friendly
Noisy vs. quiet
Cloudy vs. sunny
Barren vs. alive
So to me it seems like if we have a window opening to the outside in every art room, then no matter what feel we give that room, the atmosphere would always be invaded by the feel of the world outside of the art museum--So if the atmosphere of a room was primitive, artificial, dark, ominous, dull, and closed with purple and blue-purple lights and a color cast of dark greys and dark blues...and then if there was a window open on the end wall showing an open, colorful, alive, natural, bright, peaceful scene outside with a palette of greens or reds or whatever and natural yellow/white sunlight pouring in through the window...well, it would be like a serving of green beans with whipped cream on top!

Or like having an imager which showed a picture of jungly Negilahn in every pod, whether the theme was desert, ice, or dark waters.