Hi William.

Not to make a shameless plug about my product, but Reality 4 does make Poser behave like photography. Lights work exactly like real lights; there is a mesh light with Gobo and Snoot, that work exactly as you expect: the larger the light, the softer it is. Lights also have color temperature, exactly like in photography, so, if you mix a light at 3200K with one at 6500K and white balance for the latter you will get an orange hue for the first light. And so on.

Reality 4 - Poser Edition: http://preta3d.com/purchase-reality-4/

Cheers.

Paolo

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