So first, let’s create an MIA material X. 318 for each.Īnother piece to change is to render with a MIA Material when using Mental Ray and because we’re dealing with Exposure nodes (whether exposure_simple or exposure_photographic) you’ll need to gamma correct the shader as well. In it’s attributes, change the R, G, and B values to.
Now you just need to change your RGB space for the Exposure node. Now you can delete the “mia_exposure_simple” if you’d like. Now click “message” on Output, and “miSkyExposure” on Input. This time you will click “Other”.Ī pop-up dialog opens where you need to select certain input and output connections, but by default they are hidden so you have to turn on “show hidden” So you will click the Exposure Photographic and middle mouse drag it onto the “Physical Sky” node. Now you need to assign it to the Physical Sky node. This assigned the Exposure Photographic to the Camera. Now it will ask you where to assign the connection. A “Plus” sign will appear and release middle mouse button. Click the “exposure_photographic” node, middle mouse drag to the shot_camShape. This creates the “mia_exposure_photographic” node and you’ll see it appear in the Hypergraph Connection windows. Now open up Hypershade, click on Mental Ray-Lens, then click on the “ mia_exposure_photographic” node. To swap from the “Exposure_Simple” node to the “ Exposure Photographic” node, select your camera, then go to “ Window–Hypergraph:Connections”. 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 “mia_exposure_photographic” 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 don’t know what they mean or will do. You have gamma and gain that seem to make sense, but the rest aren’t as apparent (at least to me). Now the parameters of this node aren’t as user friendly as one would like. It also creates a “mia_exposure_simple node” that is attached to your camera and is visible in a tab for your camera’s attributes. It is basically a Directional Light with extra bells and whistles. Physically translating this light does not change it’s angle, only the rotation does. Rotate this sun Light to position the Sun’s angle. This creates a “sunDirection” light in your scene. Under “Indirect Lighting” tab, Environment click “create” under Physical Sun and Sky button.
Switching from Exposure Simple to Exposure PhotographicĬreate Physical Sun and Sky.