I know re-touching KSP screens is truly a worthless endeavour... But here's a nice example of tweaking the saturation, contrast, and brightness; then adding a filter with selective focus: Edit: A gravity lense is the warped, and distorted appearance of electromagnetic radiation caused by it traveling through a spacetime curvature. Because light (in general relativity) follows the spacetime curve, and mass causes spacetime to distort; creating gravitational fields, you'll get a Phenomena known as light bending.