Click the вЂњexposure_photographicвЂќ node, middle mouse drag to the shot_camShape. This creates the вЂњmia_exposure_photographicвЂќ node and youвЂ™ll see it appear in the Hypergraph Connection windows. Now open up Hypershade, click on Mental Ray-Lens, then click on the вЂњ mia_exposure_photographicвЂќ node. To swap from the вЂњExposure_SimpleвЂќ node to the вЂњ Exposure PhotographicвЂќ node, select your camera, then go to вЂњ WindowвЂ“Hypergraph:ConnectionsвЂќ. Now this node has more options and they are listed in more photographic terms ISO, camera shutter, F number (F-stop), burning highlights, crushing blacks, and etc. This is the reason want to switch to the вЂњmia_exposure_photographicвЂќ node. Now based on the settings of the Exposure Simple, I can Gamma or Gain the image, but rest of the terms (Pedestal, Knee, Compression) I donвЂ™t know what they mean or will do. You have gamma and gain that seem to make sense, but the rest arenвЂ™t as apparent (at least to me). Now the parameters of this node arenвЂ™t as user friendly as one would like.

It also creates a вЂњmia_exposure_simple nodeвЂќ that is attached to your camera and is visible in a tab for your cameraвЂ™s attributes.

It is basically a Directional Light with extra bells and whistles. Physically translating this light does not change itвЂ™s angle, only the rotation does. Rotate this sun Light to position the SunвЂ™s angle. This creates a вЂњsunDirectionвЂќ light in your scene. Under вЂњIndirect LightingвЂќ tab, Environment click вЂњcreateвЂќ under Physical Sun and Sky button. Switching from Exposure Simple to Exposure PhotographicД¬reate Physical Sun and Sky.

Plugin mental ray for maya 2016