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  • VRayCam EV settings

    Didn't I read somehwere a long time ago that we will be getting EV in the VRayCam?

    I don't see it in the 3 beta, I'm geussing it's still on the "to do" list?
    Kind Regards,
    Morne

  • #2
    some way of locking the exposure is something i've been asking for for ages...

    I think the f-stop, shutter speed and ISO should all be grouped together in the vrayphysicalcamera settings for a start, as they all affect exposure. Then maybe some way of locking them so that once you have found a good exposure setting, changing the f-stop affects the shutter speed, or ISO

    typically the way this affects my work is that I have found a good exposure setting at f8 or something, but then I want to change to say f2.8 but keep the EV the same. Normally I choose realistic shutter speeds and can work it out in my head, but if for some reason I used a shutter speed like 1/70th then i resort to using this webpage:http://www.giangrandi.ch/optics/lenses/expcalc.html
    www.peterguthrie.net
    www.peterguthrie.net/blog/
    www.pg-skies.net/

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    • #3
      If you use the VRayExposureControl, it has an EV value...

      Other than that, exposure priority has been on the list for a while...

      Best regards,
      Vlado
      I only act like I know everything, Rogers.

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      • #4
        +1 for all of the above. Do we have the ability to change the WB in the VFB yet?
        Alex York
        Founder of Atelier York - Bespoke Architectural Visualisation
        www.atelieryork.co.uk

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        • #5
          Originally posted by vlado View Post
          If you use the VRayExposureControl, it has an EV value...

          Other than that, exposure priority has been on the list for a while...

          Best regards,
          Vlado
          Yeah, specially if you have a smooth value to have the exposure changing accordingly depending on the brightness of the overall image (ie : going from outdoor to indoor), you don't want to have each image with a drastic different exposure, this could introduce flickering...

          For the time being, I'm still using Lele's Matrix-Weighted Exposimeter to quickly expose, but having a exposure priority would be a huge help in everyday's workflow...
          Date Updated:
          09/08/2008
          Author Name:
          Emanuele Lecchi
          It's been a while since this script is out

          Stan
          3LP Team

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          • #6
            Shameless plug but my VRay Camera Manager on Scriptspot has shutter, iso and aperture priority modes.
            Dan Brew

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            • #7
              I have an EV chart on my wall, which I reference all the time.
              Originally posted by peterguthrie View Post
              some way of locking the exposure is something i've been asking for for ages...

              I think the f-stop, shutter speed and ISO should all be grouped together in the vrayphysicalcamera settings for a start, as they all affect exposure. Then maybe some way of locking them so that once you have found a good exposure setting, changing the f-stop affects the shutter speed, or ISO

              typically the way this affects my work is that I have found a good exposure setting at f8 or something, but then I want to change to say f2.8 but keep the EV the same. Normally I choose realistic shutter speeds and can work it out in my head, but if for some reason I used a shutter speed like 1/70th then i resort to using this webpage:http://www.giangrandi.ch/optics/lenses/expcalc.html
              Bobby Parker
              www.bobby-parker.com
              e-mail: info@bobby-parker.com
              phone: 2188206812

              My current hardware setup:
              • Ryzen 9 5900x CPU
              • 128gb Vengeance RGB Pro RAM
              • NVIDIA GeForce RTX 4090 X2
              • ​Windows 11 Pro

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              • #8
                Originally posted by DanielBrew View Post
                Shameless plug but my VRay Camera Manager on Scriptspot has shutter, iso and aperture priority modes.
                Very useful script

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