I had a spare pair of legs in Resin Soul's light tan/coffee colour (I re-legged Belena so she could have sheep-type legs). So about a year ago I taped off the bottom part of the lower legs and put one on a south facing windowsill and the other on a north facing one. Then I put one of the thighs in a box.
In both images the top is the one from the south facing window, the middle is from the north facing window and the lower is the control thigh. There's also an 18% grey card to try and get the colour right after!
It's not as bad as I was expecting, although overall I'm happier the room my dolls are in is north facing, and they're out of direct light. They've both noticeably discoloured, with the one from the south facing windowsill getting a more yellowish hue to it. I did try to turn them to start off with, but gave up after a couple of months or so - so I'm surprised at how evenly the exposed resin has changed colour.
sock tan lines?
