In 3ds Max, can't render - results all black, help!!
OK, so I'm working on this scene - just a building, nothing fancy (first scene I've ever done in 3D Studio Max, by the way). Now, I've pre-rendered many, many times in the process, and I always got a result. However, I got a tutorial on lighting, and after I tried a couple of things there, suddenly the pre-render started showing nothing but black. Actually, when I add like 20 light sources, I can see something, but this isn't the way it was before, and I have no idea how to fix it. It almost seems like the default light source got turned off somehow, so that even when I delete all the lights, I get blackness (but only in render - viewports are fine).
Oh, and also, I opened a different Max scene, made by someone else, and the render worked fine there.
Please, help out, guys! I'm going nutz!
P.S. Oh, and while you're at it, can I have a teeny tiny pointer on how to make reflective skyscraper-ish glass in Max?

