[Texture Opacity]

Thanks all for the advice. The receive shadows setting in my RW background did the trick. Of course that drove my render time WAY up. 

[Texture Opacity]

Having trouble creating a texture that blocks light.  I have a scenic element I've focused lights on, and can't seem to get light to NOT

pass through it. I created a simple rectangle extrusion and put it on the back of the scenic piece... applied a texture to the extrusion... 

The texture is black and the transparency is set to plain - opacity is at 500%. Yet, when rendered, I still see light shooting through the back of the piece. 

 

Any suggestions on how to actually stop light from passing through an object?

 

thanks very much!