At this stage, utilize an action to create a convincing shadow cast on the custom background that you've created. Use the power of curves and hue/saturation layering for a convincing color build. Adjust luminosity and hue in a separate and organized way. Manipulate white and black points, creating real body for a convincing, realistic shadow effect. Learn how to evaluate and correct unwanted banding that often appears when generating custom gradients in Photoshop.