I have a light inside a spacecraft object.  When I place this spacecraft next to another object - say a spacetation - the light inside the interior not only lights up there correctly but shines through the body of the spacecraft and onto the space station! 

I know there is another thread on this and I thought the problem could be solved simply by rendering shadows and making sure that the objects and lights are set to cast shadows. I am using a spot light.  I also have tried a point light but shadows only get rendered with ray trace I think on those and when I do I get weird shadow and light designs on the object nearest the space craft.

Is there not a setting either on render or on the lights that can force objects to cast natural shadows?  Light should not be passing through these....tks

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor