Who would think sunrise on Mars could be so pulchritudinous! But, you must know, this image was computer-generated, created with help of the Mars Orbiter Laser Altimeter. Color is based on Mars' characteristics and the vertical dimension is not at all exaggerated. NASA writes:
"This computer-generated images depicts part of Mars at the boundary between darkness and daylight, with an area including Gale Crater, beginning to catch morning light. Northward is to the left. Gale is the crater with a mound inside it near the center of the image. NASA selected Gale Crater as the landing site for Curiosity, the Mars Science Laboratory. The mission's rover will be placed on the ground in a northern portion of Gale crater in August 2012. Gale Crater is 96 miles (154 kilometers) in diameter and holds a layered mountain rising about 3 miles (5 kilometers) above the crater floor. The intended landing site is at 4.5 degrees south latitude, 137.4 degrees east longitude." Picture Credit: NASA.