Use Photoshop CS6 Extended 3D tools to create a spherical object and then edit the depth map information to create contours on the object using different gray scale values.
Sprite sheets allow designers to combine multiple images in one place and then call different sections of the image to display. By loading an entire sprite sheet into memory, it helps to avoid image swamping that will slow things down. Brand new features in Fireworks CS6 will slice up an image, give each part a name and export the CSS to use with them. Watch this video to find out how.