https://i.ytimg.com/vi/oojlF0m8KSE/hqdefault.jpg Blender tutorial showing you how to make realistic puddles: http://www.blenderguru.com/tutorials/how-to-create-realistic-puddles Puddles add contrast and visual interest in your scene, while also helping to balance the composition. In this video you’ll discover a super easy way to make them in Blender, which can be used on almost any surface. source