People really don’t look at each other, at least in casual situations like dealing with a cashier at Walmart, or being robbed at a bank. They look up or down or away from the one they are talking to and never ‘study’ their faces. If they looked/stared as intently as a pair of lovers, they might actually see something.
I suspect, that if people would look reasonably closely at these faces / masks, they would detect them for what they are…masks.
With photos, videos, and on stage (lighting and distance), one can get away with more than looking someone eyeball to eyeball. If someone is that close, it seems like it would be impossible not to know it is a mask.
I have to assume that the colorations and texture of the masks closely resembles human skin; but it’s not the look as much as it is the fit at certain points. The eyes, lips, nostrils, ears.
I have to further assume that the masks are made so snugly as to allow the m muscle movement of the skin to cause movement of the mask. And that they are long enough to cover at least a portion of one’s chest and back.
The main premise of all this is that a mask adds a layer of ‘skin’ to a human face. The thickness of that layer will determine how easy it is to detect whether it is s mask or not.
The first thing I would look at would be the eyes. To get a mask that would fit that closely around the eyes would probably be uncomfortable to wear, but the eye blending into the thin latex covering over the skin would be probably detectible.
An old mans ears continue to grow well into old age, and are larger than a younger persons on average. If an old man were to wear a mask over his already enlarged ears, then the ear par of the mask would make them appear even larger.
Wearing glasses, the line of the glasses frames back to the ear should be nearly parallel to the floor, and not elevated up at an angle to the ear. If the angle is upward, then probably the masks ears are larger to cover the wearers ears, thus causing the glass to be a bit atilt.
On the good quality masks, the mouth will move with the mouth of the wearer; BUT the mouth / lips of these better masks do not form words. It might look a little like lip synching. The wearers teeth will set back ever so slightly depending on the thickness, and some part of the skin might be noticeable and the corners of the mouth.
So is the Geezer wearing a mask? In the pic, I see that the glasses frames seem to be aligned and that his ears don’t seem to be enlarged. But because of not being able to see teeth at the forefront of his face, and that his expression in other photos seems to be similar, I would guess this to be a mask. Hmmmm….wonder if the FBI would send me a couple of more detailed pics? Preferably one where I could see if he had nasal hair. LOL