I think that may be very beneficial to all of us here when it comes to doing futurist images or comic, particularly Star Wars or Mass Effect, and that is Holographic Images. I don't know if there is a better way of doing this, but this works well for me. Here's how to do it (images that you will see are of me working on Freelancer AI Upsilon, a fan-on AI on DA):
1. Pose the model of what you want.
2. Take image of the model. (It is CRUCIAL that you have the cross hairs over the model before you take snapshot)
3. After this is done, remove the model using the remover tool.
4. Take a second snapshot of where the model was, making sure you don't jerk the mouse suddenly doing this.
5. Fire up Gimp (if you have it)
6. Get both images together, one on top of the other and for one of them, adjust the Opacity of one of the images until satisfied.
If you are going to try a make a comic with a holographic transmission scene in it, use duplicator tool to save time with posing the same model over and over again. Try to ensure that you have the duplication in the exact same spot every time when doing this maneuver. Also, try to remember where the cross hairs are when doing this if it's a transmission scene. I don't know if it works on Photoshop, but if it does, please let me know.
Below is another example of using this technique and the big advantages it offers, but this time using Mass Effect:
I hope that you all find this tutorial very helpful!