It's a trick BB, the curtain was in black & white and the window and outside in colour showing the deep symbolism of being trapped inside while there is a wonderful world outside waiting to be photographed by the agoraphobic photographer.
Sorry, it is 2:40 am where I am and I cannot sleep. About to do a pre-dawn shoot some distance away with a friend who I have to get back to Sydney by 11am just in time to return the the same place with my son so he can enrol in the uni there. I am going to be wrecked tonight. Then I have another dawn shoot on the next morning with my photography group. Argh!!!!
BTW, great curtain, great shot.