I'm not in the field only talked to an ex coworker who now works for a firm and we were only talking about the use of 3d not photoshop. That said I'm not surprised that it is used, I'd be surprised if it wasn't. What I think has the potential for danger is the difference between a sketch and a photo or 3d is a sketch is obviously a representation. When you start playing with 3d or photoshop the line between reality and fiction quickly get blurred, and the potential for misleading people. Deliberate or not. The more advanced the technology the greater the danger. I create images quite often placing objects in scenes that aren't there and have been surprised by how easy it is to fool people. I work in advertising and deal with laws that have been created to protect the public from the deceptions, for example it used to be common practice to create fake food that photographed well or held up under the hot lights. Now there are laws that prevent that. I can only shoot the products as they exists. but you'ld be surprised how much retouching still occurs to create a perfect reality. My concern is that in advertising the public expects the lies and still they get fooled in a court of law truth should take presidence. The danger comes in when the tools make it easy to alter what apears to be the truth. People believe what they are told and if you can create a visual to back it up they'll believe it even more quickly. I can see how the tools can be helpful and used to clarify the truth but I can also see how easily they could be used to blur the truth. Like any tool they can be used to help or misused and cause harm.