What first struck me when I saw the "new" photo was the dark shadow underneath the ball of the foot, which looked more like a reflection from a metallic/mirrored surface, such as a stainless-steel mortuary table or gurney, rather than from a carpet or blanket. If the foot had been lying on a matt fabric, the shadow cast by a ceiling light or camera flashgun would have been completely dark or black, rather than the different shades that it appears to be.
The light-greenish hue in the rest of the picture is more likely be reflection of a similarly coloured ceiling of a mortuary room.


The photo obviously wasn't taken in the master bedroom, because the carpet was a cream/beige colour, unless it's being claimed that the body was on top of a green sheet/blanket on the floor, but the reflection theory suggested above would rule this out.
I doubt that it's faked or of anyone else’s foot if his lawyers obtained it from original trial or police files.
But part of their latest submission is about this photo (and/or others) not being shown to the jury, when Sheila's feet were described to them as spotless... a pointless semantic argument really, because it depends on how one defines “spotless” and to what degree.
Six toes ?... bunions ?... easy enough for his team to answer that by asking Mr. Caffell.