Color to Black and White Photography. Your challenge this month is to convert a photo you have taken within 2 weeks to black and white. The photo needs to contain the image of a plant; a tree, flower, grass, etc. The plant does not need to be the main focus, but it does need to be included.I, of course, chose Indy as the main subject with the sun shining through the leaves of the bushes onto his face. In addition, I chose to convert it to black and white using the channel selections. I really like how it turned out.