re: WP8.1 Start Screen & Backgrounds
Here is mine currently:
I made the picture from a colour photo. I used the Colorize app way back on my HTC HD 7 mango phone. I made the image black and white, then excluded the pupils. A little playing with contrast, hue, and brightness in another photo app and voil?. All on the phone.
I like having a mix of transparent and opaque tiles.