Lancome's Dual Finish Powder has an amazing texture, and being a matte finish makes it work well for a contour powder if you go a few shades darker than your skin tone. The powder is silky smooth, and just blends beautifully into the skin.
I have other bronzing powders that I do enjoy (i.e. Tarte's Park Avenue), but for a more sculpted look, I thought this would be the best technique to achieve that evening out look that I might want. I love the idea of using a face powder as a contour powder because the shade ranges for face powders are broader, giving you more options for your skin tone.
I would use a precision cheek brush to really work the product into the hollows of my cheeks blending up and out to the ear. Also working the color into the temples of your forehead and along your jaw bone really slims down the look of your face (hence contouring) and looks beautiful in pictures.