Postprocessing Module

Generate a texture that represents the luminosity of the current scene, adapted over time to simulate the optic nerve responding to the amount of light it is receiving. Based on a GDC2007 presentation by Wolfgang Engel titled "Post-Processing Pipeline"

Full-screen tone-mapping shader based on http://www.graphics.cornell.edu/~jaf/publications/sig02_paper.pdf

class AdaptiveToneMappingPass