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    Various rendering choices? -- Challenge!

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    • TaffGochT Offline
      TaffGoch
      last edited by

      Working with Kerky camera f-stop settings ("Scene> Camera" menu,) I eventually got the amount of depth-of-field blur that I was seeking:

      f/3.5
      Compared to the original:

      Initial render
      Yeesh, this is a lot more time-consuming than looking through a camera stopped-down viewfinder!

      -Taff

      "Information is not knowledge." -- Albert Einstein

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      • boofredlayB Offline
        boofredlay
        last edited by

        Here is another angle. I used the same lighting setup as the last one, changed the material to green gum and added a beige backdrop. I also changed the Camera F-Number to 22.


        Ball_138.jpg

        http://www.coroflot.com/boofredlay

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        • TaffGochT Offline
          TaffGoch
          last edited by

          @unknownuser said:

          Here is another angle. I used the same lighting setup as the last one, changed the material to green gum and added a beige backdrop. I also changed the Camera F-Number to 22.

          Wait, wait, wait... πŸ˜•

          I thought that higher f-stop provides greater depth-of-field. Wouldn't f/22 give you a large range of in-focus detail?

          Are you positioning the camera right up against the sphere?

          -Taff

          "Information is not knowledge." -- Albert Einstein

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          • boofredlayB Offline
            boofredlay
            last edited by

            Yes and yes. I put the camera almost dead on the sphere. I had to change the F stop to a larger number otherwise it was too blurry. On the previous one I did the camera was farther away.

            http://www.coroflot.com/boofredlay

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            • TaffGochT Offline
              TaffGoch
              last edited by

              Thanks, Eric.

              I'm glad I have some photography experience under my belt, otherwise, I wouldn't even have been able to guess. πŸ˜‰

              My test renders have been with the camera at greater distance, with 135mm "lens" to reduce perspective distortion. (I assume you're using the "standard" 25mm lens.)

              My last render, with which I am delighted, took a lot longer to render. I assume this is processing "overhead," due to the out-of-focus regions. I note that the anti-aliasing time went WAY up.

              From the Kerkythea console:
              Ray Tracing (13839 seconds) -- 3 hr, 50 min, 39 sec
              Antialiasing (23945 seconds) -- 6 hr, 39 min, 5 sec
              Finished in 10 hours, 29 minutes and 47 seconds
              (Render settings: 1200x1200 pixels, preset "16. Path Tracing - High + AA 0.3")


              Thanks, again, Eric, for your help & contributions.

              -Taff

              "Information is not knowledge." -- Albert Einstein

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              • TaffGochT Offline
                TaffGoch
                last edited by

                I've seen a stereoscopic SU/GE model of Machu Picchu (within this forum,) but haven't seen any stereoscopic renderings.

                Has anyone pursued stereo rendering? (I'm thinking this model should make a good subject.)

                -Taff

                "Information is not knowledge." -- Albert Einstein

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                • U Offline
                  Unkr3at1v
                  last edited by

                  Just a try for a quick benchmark test of my father's new PC!
                  A quick studio setup with two rectangle lights.
                  Took about 40 min (800*x) in vray. Thought it would be faster.

                  Tomorrow I will try a glass material. That will give some nice caustics.
                  Also tried Jade, but I can't get that damn translucency thing to work in Vray.

                  Greetz, Fritz


                  1.png

                  'To Start Press Any Key'. Where's the ANY key?

                  http://www.youtube.com/user/unkr3at1v

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                  • boofredlayB Offline
                    boofredlay
                    last edited by

                    Nice reflections.

                    http://www.coroflot.com/boofredlay

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                    • N Offline
                      notareal
                      last edited by

                      @taffgoch said:

                      Thanks, Eric.

                      I'm glad I have some photography experience under my belt, otherwise, I wouldn't even have been able to guess. πŸ˜‰

                      My test renders have been with the camera at greater distance, with 135mm "lens" to reduce perspective distortion. (I assume you're using the "standard" 25mm lens.)

                      My last render, with which I am delighted, took a lot longer to render. I assume this is processing "overhead," due to the out-of-focus regions. I note that the anti-aliasing time went WAY up.

                      From the Kerkythea console:
                      Ray Tracing (13839 seconds) -- 3 hr, 50 min, 39 sec
                      Antialiasing (23945 seconds) -- 6 hr, 39 min, 5 sec
                      Finished in 10 hours, 29 minutes and 47 seconds
                      (Render settings: 1200x1200 pixels, preset "16. Path Tracing - High + AA 0.3")


                      Thanks, again, Eric, for your help & contributions.

                      -Taff

                      If you have simple lighting in KT (like one or two lights) then path tracing progressive might be the best option. Biased rendering will loose it's advantage when scene complexity rises and you use higher photon mapping options... For complex lighting MLT or MLT/BPT are better options. If you using HDR sky for lighting (and emitters), MLT might be the best option.

                      Welcome to try [Thea Render](http://www.thearender.com/), Thea support | [kerkythea.net](http://www.kerkythea.net/) -team member

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                      • TaffGochT Offline
                        TaffGoch
                        last edited by

                        @notareal said:

                        If you have simple lighting in KT (like one or two lights) then path tracing progressive might be the best option. Biased rendering will loose it's advantage when scene complexity rises and you use higher photon mapping options... For complex lighting MLT or MLT/BPT are better options. If you using HDR sky for lighting (and emitters), MLT might be the best option.

                        Thanks, notareal,

                        That is great to know, as I haven't previously seen any recommendations about which render mode is best, under various scene conditions. KT has so many options, any tips/tricks are highly beneficial. If you've got any other such tips, or can reference KT webpage/forum URLs for such, I'd love to hear about 'em.

                        -Taff

                        "Information is not knowledge." -- Albert Einstein

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                        • N Offline
                          notareal
                          last edited by

                          Tutorials master list is a good starting point and not to forget forum search πŸ˜‰

                          Welcome to try [Thea Render](http://www.thearender.com/), Thea support | [kerkythea.net](http://www.kerkythea.net/) -team member

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                          • TaffGochT Offline
                            TaffGoch
                            last edited by

                            Thanks, notareal, for the tutorial links. Now, all I need is a few weeks/months to read & apply it all.


                            My last render pleases me above all my previous renders. The more I stare at it, the more three-dimensional it looks. (Who needs those fancy 3D goggles, anyway!)

                            http://i579.photobucket.com/albums/ss233/taffgoch/Weave_Toned_Silver_f35-1.jpg

                            What a great program Kerkythea is, and what great help and inspirational ideas you guys provided.

                            -Taff

                            "Information is not knowledge." -- Albert Einstein

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                            • Chris FullmerC Offline
                              Chris Fullmer
                              last edited by

                              Looks good Taff. I can't get my eyes to uncross....but oh well. It probably looks better than how my face used to look 😲

                              Lately you've been tan, suspicious for the winter.
                              All my Plugins I've written

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                              • TaffGochT Offline
                                TaffGoch
                                last edited by

                                Stereo: View cross-eyed
                                Initial experiment with KT stereo-image production. View by crossing your eyes, until the two images superimpose in the center. (It will look like 3 images in-a-row.) Concentrate on the center image, until it comes into focus.

                                I used SketchUp to produce two "scenes," which merge into KT as two cameras. (Getting the spacing is tricky. You don't want to overdo the angular separation. It is supposed to mimic the angular separation of your eyes, so camera distance is also a factor.)

                                -Taff

                                "Information is not knowledge." -- Albert Einstein

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                                • daleD Offline
                                  dale
                                  last edited by

                                  @taffgoch said:

                                  [attachment=0:31w8a5i7]<!-- ia0 -->Stereo_Weave_01.png<!-- ia0 -->[/attachment:31w8a5i7]
                                  . View by crossing your eyes, until the two images superimpose in the center. (It will look like 3 images in-a-row.) Concentrate on the center image, until it comes into focus.

                                  -Taff

                                  I find a few beer works well too! πŸ˜„

                                  Just monkeying around....like Monsanto

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                                  • olisheaO Offline
                                    olishea
                                    last edited by

                                    that stereo view is amazing!! looks like avatar!!

                                    seriously impressive but my eyes hurt!

                                    oli

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                                    • N Offline
                                      notareal
                                      last edited by

                                      @olishea said:

                                      that stereo view is amazing!! looks like avatar!!

                                      seriously impressive but my eyes hurt!

                                      Lucky you! I think I have some wiring problems - I never been able to see these kind of "3D" images. No matter how much I try to focus... de-focus or what ever. But different 3D glasses do usually work fine.

                                      Welcome to try [Thea Render](http://www.thearender.com/), Thea support | [kerkythea.net](http://www.kerkythea.net/) -team member

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                                      • olisheaO Offline
                                        olishea
                                        last edited by

                                        you have to move your head back and forward to get the "focal length" right lol it really does look 3D!!

                                        oli

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                                        • D Offline
                                          d12dozr
                                          last edited by

                                          This is a great learning thread...thanks Taff! My small contribution, if you can call it that...all that I supplied was the computing power. Magnifying lens and scene by Fletch at the Twilight Render Forum.


                                          Geodesic Weave Magnifying Glass.jpg

                                          3D Printing with SketchUp Book
                                          http://goo.gl/f7ooYh

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                                          • TaffGochT Offline
                                            TaffGoch
                                            last edited by

                                            @d12dozr said:

                                            This is a great learning thread...thanks Taff!

                                            Marcus,
                                            I've learned a lot, too. Your render depicts a handy concept for presentation of detail in a render.


                                            Regarding my 3D view experiment, I've completed a larger version of my initial, small, proof-of-concept render. If you have a hi-res display, the initial model will look tiny. This one should look much better on hi-res displays.

                                            (If you have trouble focusing, cross-eyed, on the center image, move your head forward or back, as suggested by Oliver Shea.)

                                            http://i579.photobucket.com/albums/ss233/taffgoch/Stereo_Weave_Gold.jpg

                                            *%(#BF0000)[Render: "16. Path Tracing - High + AA 0.3"


                                            Camera 1:
                                            Ray Tracing : ( 4,892 seconds) 1h/21m/32s
                                            Antialiasing : (12,792 seconds) 3h/33m/12s
                                            Finished in : 4h/54m/48s


                                            Camera 2:
                                            Ray Tracing : ( 4,883 seconds) 1h/21m/23s
                                            Antialiasing : (13,105 seconds) 3h/38m/25s
                                            Finished in : 4h/59m/54s


                                            Both cameras:
                                            Lens: f/4.2, 135mm focal length, 3.4m focus distance]*
                                            -Taff

                                            "Information is not knowledge." -- Albert Einstein

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