Nice looking Panzercrewman you have there Rick, I've always thought you were a talented Llama, and look forward to seeing your post's. I'm more of a basher, than a customizer, but I'm very much Into taking picture's. A couple of things that I see that make a figure look very realistic:
Pose/Posture;
When someone puts the thought Into posing the figure In a very realistic maner pertaining to the enviorment the subject may be based on really pays off, It can really bring a figure to life.
Clothing/Cloth good's;
Getting the right look to cloth garment's, and getting them to hang In a realistic manner Is another detail that can bring a figuire to life, the detail of the wrinkle's and weight of the clothing/cloth accessory can really give a life like pespective to a project.
Headsculpt Painting/Real Hair;
Two guys come to mind, Boot25, and James Van Spronsen, what else can be said LOL But seriously, details such as these really bring a figure to life as well when done right, I dream of being able to paint like John, he has such an eye for fleshtone that blows my mind, and the other details he does like hand repaint's with the cuticle detail on the fingernail's, and his work on eye's, just amazing, and then add James real hair, and that's mind blowing life like stuff. Sixty Driver Is another great talented Llama who has a wonderfull article/how to on sculpt repainting.
Gear/Equiptment Detailing;
Try to detail and make the gear look as realsitic as possible, change out any elastic's for cloth or leather, plastic for leather, flock, paint, weather, anything to make the gear look real and not like a toy always pays off. Look at what guys like Mountain Trooper have done with simulating wood.
Weathering;
Try to make your figure look as If he has been, or belongs In the enviorment of which you are basing the project on, but don't over/under do It, you wouldn't see muddied up dirty Fieldmarshall, but a GI who's been out In the field and In combat should be.
Photographing;
Be It a plain backround, or In a scene/dio, try to remove any non scale items, or anything to suggest the figure Is 1/6th from the picture. When using 1:1 backrounds try to pose In such a way as to give perspective and enhance the illusion that the figure itself Is 1:1. Also good lighting Is very important, and can really add to a figure. Try to make use of light and shade to add to the realism.
Hope some of this orgling helps. Good luck with your figure Rick. Enjoy