Well I agree with you in part shadowdragonlord that some people are using the wrong terms for certain things. But it seems you are wrong about Bryce not having radiosity to a point. It seems that true ambience is Bryce's radiosity setting in some situations. It may not be true radioisty but it does have some. look at the pic in the post above your's, that scene is lit by pure ambience...ie light reflecting off of objects, not direct light.

Now look at my pic using nothing but true abience and 1 light. You can see the red and blue walls bleed thier color onto the floor. There is zero reflection on the floor or the left sphere yet they pick up the walls colors. I'm not yet sure why the back wall and ceiling don't do the same.