Sorry if I wasn't clear. Attached are 2 screenshots of a sample I made quickly.

I have a tubulencefd cube on the left and blackbody cube on the right, both are emitting light.

The Dif D. renders the blacklight's emission light and nothing else. The Dif I. renders the turbulencefd's emission plus ...

Is there a way to do a pass just for texture emission? I can get blackbody to work with the diffuse direct pass but I cant get a pass to work with turbulencefd emission. Any help would be appreciated and I apologize if I missed this somewhere.