Announcement

Collapse
No announcement yet.

Rendertimes topic

Collapse
X
Collapse
 
  • Page of 3
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • #1

    Rendertimes topic

    Hi fellow vray-ers!

    I'm working with vray for quite some time now at my job, but lately we seem to have some problems with render times. We have renders now that take 48 hours to render....

    So what I wanna know is....what are the main causes for long render times?

    -is it reflections? (we keep the subdivs very low...beneath 10)
    -settings? (our renders at work are usually around 4500 pixels...and we use default settings...usually irradiance map preset low.)
    -AA (we usually use adaptive subdivion)
    -something other than that?

    Just very curious what points at rendering take very long....So I can keep that in mind, so that maybe I could cut back on certain things..
    The problem is that we have some deadlines here and the renders take far to long to render...

    Here's an image of one of our latest work..This one also took pretty long, although it's not a very difficult scene.

    Thank you in advance!

    "Do...or do not. There is no try"
    Tags: None
  • #2
    do you use glossiness in your materials?

    Comment

    • #3
      Originally posted by TOBTHREEDEE
      do you use glossiness in your materials?
      Yeah I do...a lot actually.. All wood materials have reflections with glossiness.
      Is that a point where it slows down rendering?
      "Do...or do not. There is no try"

      Comment

      • #4
        Looks like glossies are being used on the wood materials. This will jack up rendertimes greatly.

        Comment

        • #5
          Originally posted by Sebastiaan
          Originally posted by TOBTHREEDEE
          do you use glossiness in your materials?
          Yeah I do...a lot actually.. All wood materials have reflections with glossiness.
          Is that a point where it slows down rendering?
          Looks like you beat me to my previous post there.

          Yes, glossies will stretch out rendertimes dramatically in most cases.

          PS: Nice render though!

          Comment

          • #6
            So...if it's the glossiness, is there a way to solve it? To speed it up?
            Or is it impossible to avoid it? One thing is that I don't want to ruin my material..make it look worse. I want to keep te great glossy effects..

            Thanks!!

            Sebastiaan.
            "Do...or do not. There is no try"

            Comment

            • #7
              maybe to work with blur maps?

              i rendered a picture with glossiness 1 in 1min30sec and the same picture with glossiness 0 (only one material in scene) in ~12min

              Comment

              • #8
                Does "use interpolation" make any difference with rendering speed?

                Sebastiaan
                "Do...or do not. There is no try"

                Comment

                • #9
                  This is from the oldest manual I have...
                  "Glossiness - the glossiness of the material. A value of zero means extremely blurry reflections. Higher values makes reflections sharper"

                  so...

                  Glossy 1 = clear "Glossy" reflections
                  Glossy 0 = Blurry reflections or no Glossy.

                  --Jon

                  Comment

                  • #10
                    Sebastiaan

                    If you are rendering still images, try using interpolated glossies.

                    Open a scene you are having problems with, re-save it under a new filename and check 'use interpolation' for reflections for all materials where the 'glossiness' is not set to 1.

                    Then try the settings below for 'Reflect Interpolation'

                    http://vr.reaperfields.com/index.php...ile=RefInt.jpg

                    You could also try -2 for the 'Max Rate' which would be even quicker but with a reduction in quality.

                    Also, the GI presets are designed to be used for image sizes around 640x480. So the low setting is actually a very high setting for an image the size you a rendering.

                    Hope some of this helps,

                    Dan
                    Dan Brew

                    Comment

                    • #11
                      Originally posted by Sebastiaan
                      Does "use interpolation" make any difference with rendering speed?

                      Sebastiaan
                      Greatly, Just leave it at 50 and check interpolation. This feature is specifically for stills.

                      --Jon

                      Comment

                      • #12
                        This is from the oldest manual I have...
                        "Glossiness - the glossiness of the material. A value of zero means extremely blurry reflections. Higher values makes reflections sharper"

                        so...

                        Glossy 1 = clear "Glossy" reflections
                        Glossy 0 = Blurry reflections or no Glossy.

                        --Jon

                        Uhmmm...yeah..I know this...that's not my problem.


                        Sebastiaan

                        If you are rendering still images, try using interpolated glossies.

                        Open a scene you are having problems with, re-save it under a new filename and check 'use interpolation' for reflections for all materials where the 'glossiness' is not set to 1.

                        Then try the settings below for 'Reflect Interpolation'

                        http://vr.reaperfields.com/index.php...ile=RefInt.jpg

                        You could also try -2 for the 'Max Rate' which would be even quicker but with a reduction in quality.

                        Also, the GI presets are designed to be used for image sizes around 640x480. So the low setting is actually a very high setting for an image the size you a rendering.

                        Hope some of this helps,

                        Dan
                        He thanks a lot!! I'm gonna try that! Hope it helps. I appreciate it!

                        Sebastiaan.
                        "Do...or do not. There is no try"

                        Comment

                        • #13
                          No problem, thank me if you are happy with the result
                          Dan Brew

                          Comment

                          • #14
                            Sebastiaan:

                            That should have been directed at TOBTHREEDEE.

                            --Jon

                            Comment

                            • #15
                              Why?

                              [
                              Glossy 1 = clear "Glossy" reflections => fast
                              Glossy 0 = Blurry reflections or no Glossy => very slow
                              ]

                              Comment

                              Previous 1 2 3 template Next
                              Working...
                              X