Reflective material - limit reflections

[guest83783]

I realise my last post was in the wrong category:

I've modelled a shape in Rhino using T-Splines so I know it's a sound form with no errors...  When I apply a reflective material everything goes a bit Pete Tong.

I've added a succession of images, the last one has been split and reimported...

Any ideas why this is happening?  I've also tried with everything turned up to eleven.

How do I limit the number of internal reflections?

Cheers

Andy

[JST]

There is an entry for ray reflections under "settings", that may help.  It defaults to 6, but you can change it with the slider or numerically.