I would like to generate a rendering using only reflected light from a point source, not diffuse scattering. The purpose of this is to generate an image of the object similar to the way a radar sees it. A radar can only see reflected radiation, not diffusely radiated light the way the eye can. For example:
So, for example, in this image of a missile we see the reflected energy only (the outline of the missile is shown just for clarity, the radar can only see what is light blue and green/yellow/red).
Blender should have this capability when it renders "glare" (reflected light). So basically what I need to do is generate only glare. Also, I need to false color the glare (as above) so that the more intense the glare, the more red the color. How can I do this in Blender?