Skylight-esque shadows internally with mental ray?

[Exar Kun]

Hi, I'm currently creating the attached scene (low quality render sorry). I'd like to add some shadowing but it doesn't have to be accurate. Currently the only lighting in the scene is some omnis for ambient lighting and the self-illuminating materials you see on the ceiling. Is there a way of getting some sort of basic shadowing in there that doesn't carry too much of an overhead as this will be part of an animation. I'm probably asking a lot.

 

Thanks.

[arquiteck09]

what kind of shadows for omni lights did you use?? are they activated ??. Since it is an interiors scene i personally recomend that you use "area shadows" that can give better results.