How to make just 1 object render backface culling and the others not? I want to render 2 spheres cut in half one I want backface culling so you only see its normals side and the other I want to see both sides of the faces in the same render.

How do I set render to no backface culling and apply an exception to 1 material?
As mentioned in this Question, if you use the Cycles renderer, you should be able to use the backface output from a geometry node to mix between a diffuse and a translucent shader.

This simulates backface culling.