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    Controlling texture quality?

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    • stefanqS Offline
      stefanq
      last edited by

      Yup, just tried QMC, with lower thresholds, like 0,002, then tried fixed rate, and it was better. I remember something about using QMC but with adaptive amount set to 1, not to 0,85, with the same results like fixed rate, but half the rendering time. It was long time ago, I don't remember if it was a video tutorial or not, it was for V-ray for max for sure, but the discussion was about image sampling/anti-aliasing stuff.

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      • H Offline
        howardhong
        last edited by

        belows my rendering spend couple a minutes

        http://i241.photobucket.com/albums/ff294/howardhong/TextureQuality-howard.jpg

        im gonna attatch my presets
        change shutter speed and f-number when you wanna use


        TextureQuality-howard.skp


        Options.zip

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        • thomthomT Offline
          thomthom
          last edited by

          I had to use DMC once when I was rendering a model with some really thin details - it took ages to render it in a quality needed without too much noise. I try to stay away from DMC.

          Thomas Thomassen β€” SketchUp Monkey & Coding addict
          List of my plugins and link to the CookieWare fund

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          • stefanqS Offline
            stefanq
            last edited by

            Doh...it is DMC not QMC....old habits.
            So, next one is Adaptive DMC, min.1 max 50, color threshold 0,002 noise threshold 0,002
            Rendering time, less then 5 minutes, but it still has noise on the upper deck, up-right .


            qmc50.jpg

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            • thomthomT Offline
              thomthom
              last edited by

              Is all this without Filter Blur?

              Thomas Thomassen β€” SketchUp Monkey & Coding addict
              List of my plugins and link to the CookieWare fund

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              • stefanqS Offline
                stefanq
                last edited by

                Yes, without Filter Blur.
                Now, I switched back to Adaptive DMC, min. 1 max. 16, but with noise threshold and color threshold to 0,001. Kind of extreme values for thresholds, but it's almost flawless, and the rendering time in good shape, 8.30 minutes.
                I think if you have some texture, the noise will blend nicely and you'll be fine with thresholds @0,005. Here is the image


                dmc16-0,001.jpg

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                • thomthomT Offline
                  thomthom
                  last edited by

                  These tests are actually quite interesting.

                  Too bad I'm home now. Don't have my V-Ray set up. πŸ˜•

                  Thomas Thomassen β€” SketchUp Monkey & Coding addict
                  List of my plugins and link to the CookieWare fund

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                  • thomthomT Offline
                    thomthom
                    last edited by

                    DMC Minimum Subdivisions: 1

                    DMC Minimum Subdivisions: 2

                    DMC Minimum Subdivisions: 4

                    Thomas Thomassen β€” SketchUp Monkey & Coding addict
                    List of my plugins and link to the CookieWare fund

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                    • N Offline
                      nomeradona
                      last edited by

                      i agree with stefan, using adaptive dmc with lower treshold will solve the matter. and also ticking ambient occlusion will further bring out details..

                      visit my blog: http://www.nomeradona.blogspot.com

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                      • thomthomT Offline
                        thomthom
                        last edited by

                        I always use a little bit of AO.

                        I found that a little Filter blur to the TexBitmap helped greatly and reduced the need to increased adaptive DMC too much.

                        Thomas Thomassen β€” SketchUp Monkey & Coding addict
                        List of my plugins and link to the CookieWare fund

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                        • N Offline
                          nomeradona
                          last edited by

                          @thomthom said:

                          I always use a little bit of AO.

                          I found that a little Filter blur to the TexBitmap helped greatly and reduced the need to increased adaptive DMC too much.

                          honestly its my first time to see the effect of filter blur, i am interested to find out more by doing some further testings..

                          visit my blog: http://www.nomeradona.blogspot.com

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                          • thomthomT Offline
                            thomthom
                            last edited by

                            I don't think 0.0 has used to be the default. In Max, with Mental ray it's 1.0 (which I think is too much though.)

                            VfSU's defaults isn't the best. Max' defaults are better tuned IMO. Anyone with V-Ray for Max - can you check what the defaults are there?

                            With Filter Blur set to 0.0 it'd be no anti-aliasing - hence the noise.

                            Thomas Thomassen β€” SketchUp Monkey & Coding addict
                            List of my plugins and link to the CookieWare fund

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                            • V Offline
                              valerostudio
                              last edited by

                              I never touch the filter blur. All of those broken lines are controlled by your Image Sampler. Some say that the image sampler is the most important setting for quality.

                              This video explains the fixed rate sampler and how your settings clean up an image but translate to longer render times.

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                              • thomthomT Offline
                                thomthom
                                last edited by

                                Nice video. Might have to check out the rest of that.

                                So, how do you work with the sampler? Do you leave minimum at 1 and tweak the Color Threshold until satisfactory?

                                Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                List of my plugins and link to the CookieWare fund

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                                • thomthomT Offline
                                  thomthom
                                  last edited by

                                  But in terms of the model I posted, the texture has black and white lines - the most extreme color values you can get. You'd think that was enough contrast for the threshold to trigger higher samples?

                                  Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                  List of my plugins and link to the CookieWare fund

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