V-Ray 8.19 [physical camera]

“Exposing the scene using a physical camera”


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V-Ray Version 3.6+:

  1. Open a Rhinoceros file in which you have already added a V-Ray Sunlight and Sky System.  If you do not have a sunlight and sky system in your file, please follow V-Ray 8.17 [sun] and V-Ray 8.18 [sky] to establish them.
  2. Open the V-Ray Asset Editor and click on the "Settings" tab.
  3. Expand the "Camera" section and adjust the "Exposure Value (EV)" up or down (A higher exposure value will result in a darker image and a lower value will result in a lighter image). [Premium Content - Login] [Membership Options]
  4. You can also choose to adjust the white balance or include a depth of field or vignette as part of your final image (Though you can also do this with the V-Ray render chanels and Photoshop. See V-Ray 8.31 [z-depth] and Photoshop 1.25 [z-depth] for more information).

V-Ray Version 1.5:

  1. Open a Rhinoceros file in which you have already added a V-Ray Sunlight and Sky System.
  2. Navigate to the V-Ray Options using the V-Ray tool bar.[Premium Content - Login] [Membership Options]
  3. In the Camera rollout, turn the Physical camera on by checking the box next to “On.” Select the Type as “Still camera.”
  4. The physical camera in V-Ray works just like a physical camera in real life. You can adjust the Aperture (F-number), the Shutter Speed, the ISO, etc.[Premium Content - Login] [Membership Options]
  5. Without a photographic background this can take some time to learn how to set up correctly. It will take some trial and error to establish the correct values for your scene. Below are some guidelines:
    • The value you type in the “shutter speed” box (above) is the denominator of the 1/xxx speed. For example, typing 1000 in the shutter speed box is an actual shutter speed of 1/1000 of a second.
    • The F-umber and shutter speed have an inverse relationship. If you decrease the shutter speed by half, you will need to increase the aperture by 2 times to get the same exposure.
    • If your rendering is too light, decrease the shutter speed (by increasing the number in the shutter speed box) or increase the F-number.
    • In bright sunlight, I would suggest starting with a shutter speed of 500, an F-number of 8 and an ISO of 125. If your scene is largely shadow, then a longer shutter speed or lower F-number will help.
    • Shutter Speed = 1500, F-number = 8, ISO = 125
    • Shutter Speed = 1000, F-number = 8, ISO = 125
    • Shutter Speed = 500, F-number = 8, ISO = 125
    • Shutter Speed = 250, F-number = 8, ISO = 125
    • Shutter Speed = 100, F-number = 8, ISO = 125

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