shadow flickering in animation using 3ds max

I'm rendering an animation using TIE fighters found on this site (nice work!) and I'm using an omni light, high up, and far from the scene to cast shadows on the models, which works fine, except in some images where part of the TIEs seem very dark, as if shadow was cast upon them, then the next frame will be A1.

Any idea on how to solve this problem?

thanks!

Martin

 

what type of shadows are you using?

 

It's a shadow map, not raytraced.

 

Shadow Maps really aren't good to use, put it on raytracing, it makes it slower though but it looks much better.

 

I'll try to raytrace it tonight

will tell you if it fixed the flicker.