Rendering Prob

Rendering a space ship with NURBS surfaces. Everytime I render, the bottom half of the spaceship model is cut off. I am using the unified renderer and rendering in parts. It worked ok several days ago, but for some reason just quit rendering half the model. Is this a lighting problem or something else (my lights are all just regular lamps)?

I would post a pic, but I don’t know any good free servers.

Stick a few lamps underneath and see. Upload to photobucket, mudpuddle or solarflarestudios.

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Prob fixed!

I was double checking my settings while making screenshots to post. I discovered that I had my mist settings ON. I turned them OFF, and it renders beautifully.

BTW . . . I now have an account at photobucket for future pics. I may get my own webspace elsewhere pretty soon.