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    Jean Prouvé - S.A.M. Tropique table - 1950

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    • daleD Offline
      dale
      last edited by

      So much to learn.... so little time 😲

      Just monkeying around....like Monsanto

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      • massimoM Offline
        massimo Moderator
        last edited by

        Rich here you have some experiments to play with on a bit unorthodox use of the fresnel effect.
        Just a fingerprints map in the fresnel reflectance slot with a custom curve...
        fresnel.jpg
        fresnel_mat.JPG
        ...the same material with a roughness map added in order to enhance a bit the effect.
        fresnel+roughness.jpg
        roughness.JPG
        Of course you can do almost the same using the map in the reflectance slot, but here the effect is more subtle and slightly changes in relation to the angle of view.

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        • massimoM Offline
          massimo Moderator
          last edited by

          And here you can see the fresnel effect in reflections on some aged plastic.
          fresnel effect.jpg
          Cattura.JPG

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          • Rich O BrienR Offline
            Rich O Brien Moderator
            last edited by

            You can definitely see the impact the roughness map has on the fingerprints. If find just the fresnel looks the best.

            Is the tweaking of the custom curve just a hit and miss affair? I can see the presets but is there info somewhere on this?

            Download the free D'oh Book for SketchUp 📖

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            • massimoM Offline
              massimo Moderator
              last edited by

              @unknownuser said:

              I can see the presets but is there info somewhere on this?

              As far as I know for Thea you have just this at the moment. But of course you can find something searching on the net.

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              • Rich O BrienR Offline
                Rich O Brien Moderator
                last edited by

                Thanks for that.

                @everyone...

                sorry for spoiling this thread with meaningless banter that should occur over on the Thea forums

                Download the free D'oh Book for SketchUp 📖

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                • massimoM Offline
                  massimo Moderator
                  last edited by

                  Anyway the concept is basically that at a 0° deg angle you can see reflections coming from what you have in the reflectance slot, and at 90° deg angle you'll see reflections coming from what you have in the fresnel slot. Adjusting the curve you can change this transition/balance relating to the viewing angle (in the x axes you have the degrees). Here you have the same plastic with a different curve. As you can see the transition in reflections is more abrupt from 0° to 90° deg because the curve goes from 0° to 90° deg more drastically.
                  fresnel.jpg
                  Cattura.JPG

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                  • Rich O BrienR Offline
                    Rich O Brien Moderator
                    last edited by

                    How have you the Structure box in the same area as the Scatter box?

                    Another off topic query.... 😒

                    That explanation makes perfect sense.

                    Download the free D'oh Book for SketchUp 📖

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                    • massimoM Offline
                      massimo Moderator
                      last edited by

                      @unknownuser said:

                      sorry for spoiling this thread with meaningless banter that should occur over on the Thea forums

                      Well I think that many rendering app (for example Vray & Maxwell) support something like that. So maybe interesting also for non-Thea users. 😄

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                      • massimoM Offline
                        massimo Moderator
                        last edited by

                        @rich o brien said:

                        How have you the Structure box in the same area as the Scatter box?

                        Another off topic query.... 😒

                        That explanation makes perfect sense.

                        Control + Left Click (on Layer/Scatter/Struct buttons). Merge layer/scattering/structure properties listed in a single panel.
                        Cattura.JPG

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                        • Rich O BrienR Offline
                          Rich O Brien Moderator
                          last edited by

                          Thanks Massimo.... 👍

                          Download the free D'oh Book for SketchUp 📖

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                          • B Offline
                            bytor
                            last edited by

                            I don't have any of these renderer's and I found this post most rewarding. Massimo - thanks so much for taking the time here to explain the detail in the material, and thanks for the model as well!

                            Find the Cost of Freedom.....

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                            • Rich O BrienR Offline
                              Rich O Brien Moderator
                              last edited by

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