Cinematic Lighting Techniques
VRay Render Settings in Pictures
Rendering is the process of the render engine taking the inputs (meshes, textures, rigs and animations), calculating their combinations and lighting inputs, and displaying the resulting images (or series of images or simulations). For the purposes of games rendering, make sure to read the following resources closely. You will not find better explanations (at the time of this writing).
Simon Schreibt - Render Hell
Unreal Engine 4 Rendering Overview For Artists
Physically Based Rendering: From Theory to Implementation
Common render engines include: