View only "incomong" without lighting

Hi, I would really like to texture objects with the following:

The only problem is lighting. Incoming is a vec3 pointing from the pixel to the camera, but I need light to see it. If I plug it into an emission node I can see it but then it will light itself and mess with the “incoming” value.

Ideally this is the kinda thing I’d do in Blender Internal since you can just have it essentially unshaded, but Blender Internal does not have this ‘incoming’ value.

Is there anything I can do to see it?

Not by that name… but you can transform the negative of the ViewVector of the Camera Data node, from CameraSpace to WorldSpace and it will be exactly the same as the incoming vector in cycles.

Thank you Secrop! The view vector is ultimately what I was after anyway, perfect.