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    Which image sampler to choose?

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    • StinkieS Offline
      Stinkie
      last edited by

      Don't use the fixed sampler. It's great quality-wise, but it'll slow your render down to a crawl.

      The adaptive subdivision sampler I never use myself -interiors tend to have high detail textures, lots of blurry reflections etc. So that leaves the adaptive dmc image sampler.

      Settings for tests: min rate 1 (I never change the min rate), max rate 4, threshold 0.01. Dmc sampler settings: default.

      Final render settings: min rate 1, max rate 8, threshold 0.005. Dmc sampler settings: adaptive amount 0.85, noise threshold 0.005 (lower = better quality), min samples 8 (higher = better quality), subdivs mult 2 (the default is one; by changing this value to 2, you're effectively doubling every subdivision setting in your scene. The quality of DOF, IR cache, brute force GI, reflections, shadows etc will increase.)

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      • I Offline
        inbal
        last edited by

        thank so much πŸ˜„

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        • StinkieS Offline
          Stinkie
          last edited by

          No problem. Do investigate further, though. Taking my word on the inner workings of Vray as gospel may quite possibly not be the best of ideas. And check this out: http://www.thegnomonworkshop.com/store/products/tutorials/cni03/

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          • eidam655E Offline
            eidam655
            last edited by

            and additionally maybe these tutorials http://renderstuff.com/free-rendering-cg-tutorials/ and specifically this one http://renderstuff.com/best-vray-settings-dmc-sampler-cg-tutorial/ could clear up some other stuff. (yes, it'sprimarily for 3dsmax, but it's for vray, and that has the same settings universally, so it can teach you/us something.)

            I'm using SketchUp 2017, V-Ray 3.4

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            • I Offline
              inbal
              last edited by

              @eidam655 said:

              and additionally maybe these tutorials http://renderstuff.com/free-rendering-cg-tutorials/ and specifically this one http://renderstuff.com/best-vray-settings-dmc-sampler-cg-tutorial/ could clear up some other stuff. (yes, it'sprimarily for 3dsmax, but it's for vray, and that has the same settings universally, so it can teach you/us something.)

              thanks! sure is a lot of reading but hopfully I will get to it soon.

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              • V Offline
                valerostudio
                last edited by

                All the research I have done has always pointed to Adaptive DMC being the best. Production HQ settings being 2 Min and 6 Max with threshold set to .005. I have also read to leave anti aliasing off but have seen tutorials by Evermotion for V-Ray for Max using Catmull Rom.

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                • StinkieS Offline
                  Stinkie
                  last edited by

                  You could use an AA filter -nothing wrong with that. However, turning it off and sharpening in Photoshop offers more flexibility.

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                  • V Offline
                    valerostudio
                    last edited by

                    Agreed. I much rather turn it off, save the render time and use Unsharp Mask in PS.

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                    • eidam655E Offline
                      eidam655
                      last edited by

                      @unknownuser said:

                      You could use an AA filter -nothing wrong with that. However, turning it off and sharpening in Photoshop offers more flexibility.

                      now that's an interesting idea. thanks πŸ˜„

                      I'm using SketchUp 2017, V-Ray 3.4

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                      • andybotA Offline
                        andybot
                        last edited by

                        That is kinda interesting... But then you're not getting supersampling (vray calculates 1.5 or 2 pixel width per final resolution) You'd need to increase the output resolution so you can downsample to where it would be without the AA turned on.

                        http://charlottesvillearchitecturalrendering.com/

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                        • StinkieS Offline
                          Stinkie
                          last edited by

                          Cool, didn't know that. I do know rendering without an AA filter and sharpening in post is supposedly less accurate than rendering using a filter. I'm sure that's correct, but I've not noticed any adverse effects myself.

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