A white pixel appears by the side of a torch when held. It appears in both first-person (only noticeable when whacking things with it) and third-person, but I couldn't capture the first-person one using the iOS screen capture thing, taken always at the wrong moment when it's invisible (such as when looking at an item when directly above it in "Fast" graphics).

In the picture below, the white pixel is clearly seen on the wooden part of the bed, next to Steve's arm.