There's a good thread over at DAZ pointing out that Photorealism isn't really that important - if you want a picture of somebody there really isn't any scarcity of them of any type, pose, or costume. The point of 3D rendering is not to take photos, that's what camera's are for. At least for 99.99% of us, realistic is all we are looking for, not photo-realism. Which half the time someone removes with Photoshop editing anyway.