See what you can do with Nova and PS
In the interests in getting the matte painters to show themselves, or at the very least, get people interested in matte painting, we're gonna have a bit of a competition. I want you to take a planet landing pict (Nova ones are prefered, but you can use your own creations if you want) and use photoshop (or some kind of painting program) to place a building in it. You can do this however you want, really. Model something in 3D and integrate it, or draw it in 2D right there. The only thing that matters is that the city or structure looks like it belongs. That means lighting, colors, whatever it takes. Try to do the best job you can. Submit something to the topic here. The team of judges will only be judging the ones posted there, not on the other topics. So don't post your final works here!
Anyway, get a-photoshopping. You have two weeks to post as many entries as you want. Encourage each other and pass on tips. The point of this is to create a community of people who can do this kind of stuff.
Why would you want to do this? Fame, glory, fun, skill-improvement, take your pick. There's no real reward, but the knowledge in your heart that you've made me happy, and helped create a growing community of matte artists.