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    A quest for better understanding of textures

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    • thomthomT Offline
      thomthom
      last edited by

      TexWater doesn't appear to be fully implemented - it's just producing a colour that cannot be adjusted... 😞

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

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      • broomstickB Offline
        broomstick
        last edited by

        This is a great reference post. The only thing I would like to see is if these maps, once applied on the diffuse channel, are visible in the Sketchup Model, or only at rendering time.

        Nice work!

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        • thomthomT Offline
          thomthom
          last edited by

          @broomstick said:

          This is a great reference post. The only thing I would like to see is if these maps, once applied on the diffuse channel, are visible in the Sketchup Model, or only at rendering time.

          Only at render time. SketchUp has no knowledge of how V-Ray materials are designed.

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

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          • broomstickB Offline
            broomstick
            last edited by

            @thomthom said:

            Only at render time. SketchUp has no knowledge of how V-Ray materials are designed.

            So how does this make them usable?? Maybe I'm just too used to using vray materials in 3d studio max!

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            • thomthomT Offline
              thomthom
              last edited by

              @broomstick said:

              @thomthom said:

              Only at render time. SketchUp has no knowledge of how V-Ray materials are designed.

              So how does this make them usable?? Maybe I'm just too used to using vray materials in 3d studio max!

              Make use of the preview feature in VfSU's material editor (it's not great I know) or make small test scenes. I've done similar tests before to visualize these V-Ray textures and used several of them in my project.

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

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              • pyrolunaP Offline
                pyroluna
                last edited by

                I did some test with the procedural texture for wood. The variable 'center_v' seems to have the most influence on the texture size.
                It is a 3d texture, I think that means that the object cuts through the texture somehow. It reminds me of the old days with POV-ray - which has extensive documentation on all of its functions, including its procedural wood texture. (although I'm not sure wether or not they are mathematically the same)
                wood_thingies.jpg


                wood_procedural.vismat

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                • thomthomT Offline
                  thomthom
                  last edited by

                  That's a nice sample. Thanks! πŸ‘

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

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                  • eidam655E Offline
                    eidam655
                    last edited by

                    wow, thanks for this πŸ˜„

                    another thing i discovered is that with 'use_3d_mapping' checked (ie. it's ON), the result is just like you showed us; however, if you uncheck it, you'll get a texture of the wood end. demonstrating on your material:

                    http://i.imgur.com/VZzrB.jpg

                    however, i couldn't get center_v get to change the scale on my textures. i would say that center_u and _v define the center position of the texture, so i don't think this would affect the size... more testing is needed though.

                    http://i.imgur.com/Gwu0Q.jpg

                    strange thing is that even when in the TexWood preview window something is happening, in the material preview and in the render not so many things change...

                    I'm using SketchUp 2017, V-Ray 3.4

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                    • pyrolunaP Offline
                      pyroluna
                      last edited by

                      Oh yeah also this; the placement is dependent on the origin of the model or component. I'm not exactly sure how the difference between applying a material to a face or to a component is in play, but the component axes thing is clearly demonstrated in the example below:

                      wood_thingies2.jpg

                      In this image, the two little blocks on the floor are the same component - one of them made unique and the axes of that one have been put at an angle of 45 degrees in two directions.
                      As for the balls, they are the same component, one of them is rotated.

                      wooden balls.png

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                      • eidam655E Offline
                        eidam655
                        last edited by

                        just for reference, how big are your... items? ('balls' would seem inappropriate ^^)

                        my sphere is 2,646m in diameter.

                        I'm using SketchUp 2017, V-Ray 3.4

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                        • pyrolunaP Offline
                          pyroluna
                          last edited by

                          the big ones are 470mm in diameter, the little blocks are 100mm

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                          • broomstickB Offline
                            broomstick
                            last edited by

                            may I publish here a little tutorial on how to use the Vray Blend Material?

                            It's useful to have bump maps without a diffuse texture (sort of)

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                            • eidam655E Offline
                              eidam655
                              last edited by

                              sure, please, go ahead πŸ˜„

                              I'm using SketchUp 2017, V-Ray 3.4

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                              • thomthomT Offline
                                thomthom
                                last edited by

                                @broomstick said:

                                may I publish here a little tutorial on how to use the Vray Blend Material?

                                It's useful to have bump maps without a diffuse texture (sort of)

                                Yes. But please post in a new thread, and tag it [Tutorial] so it's easier to find.

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

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                                • broomstickB Offline
                                  broomstick
                                  last edited by

                                  @thomthom said:

                                  @broomstick said:

                                  may I publish here a little tutorial on how to use the Vray Blend Material?

                                  It's useful to have bump maps without a diffuse texture (sort of)

                                  Yes. But please post in a new thread, and tag it [Tutorial] so it's easier to find.

                                  Gotcha πŸ˜‰

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                                  • panixiaP Offline
                                    panixia
                                    last edited by

                                    @broomstick said:

                                    may I publish here a little tutorial on how to use the Vray Blend Material?

                                    It's useful to have bump maps without a diffuse texture (sort of)

                                    yes you can!
                                    😍

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                                    • john2J Offline
                                      john2
                                      last edited by

                                      @eidam655 said:

                                      hello winGman,

                                      create a material, open it in material editor:
                                      [attachment=1:bo417hjm]<!-- ia1 -->texgrid_tut_1.png<!-- ia1 -->[/attachment:bo417hjm]
                                      assign the TexGrid texture to the Diffuse channel (or some other channel, depending on your desired usage) and try to play around with the UV repeat values to adjust its size:
                                      [attachment=2:bo417hjm]<!-- ia2 -->texgrid_tut_2.png<!-- ia2 -->[/attachment:bo417hjm]

                                      after this, my render looks like this:
                                      [attachment=0:bo417hjm]<!-- ia0 -->texgrid_tut.png<!-- ia0 -->[/attachment:bo417hjm]

                                      and that should be it πŸ˜„

                                      is there anyway we can change multiplier by measuring tilesize. ? this would be useful while making bump maps for tiles divided in a grid. say if i want tilesize 300mm by 300mm how can i do it?

                                      Sketchup Make 2017 (64-bit), Vray 4.0 , Windows 10 – 64 bit, corei7-8750H, 16GB RAM, Nvidia GeForce GTX 1050Ti 4GB

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                                      • panixiaP Offline
                                        panixia
                                        last edited by

                                        @eidam655 said:

                                        • rock/noise pattern. is not affected by UV repeat values.

                                        • smoke/noise pattern. is not affected by UV repeat values.

                                        • snow/noise pattern with alternating alpha. is not affected by UV repeat values.

                                        • speckle/noise pattern. is not affected by UV repeat values.

                                        • splat/noise pattern. is not affected by UV repeat values.

                                        • presumably stucco/noise pattern. is not affected by UV repeat values. sadly,

                                        • is not affected by UV repeat values. in fact, it's the same case as with Stucco. a

                                        • is not affected by UV repeat values. i

                                        my 50 cents to help your quest. πŸ’­
                                        recently i discovered that for the textures rock - stucco - smoke - snow - speckle - splat - water you should untick "use 3d mapping" to enable UV tiling control. πŸ‘

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                                        • J Offline
                                          jackwatson
                                          last edited by

                                          Has anyone ever come across any clear documentation for all of these effects? The fact that there are so many cool procedural maps available, but the tutorials for how to utilise them are not seems a waste.

                                          I've spent a good few hours playing around with them before but managed to get no practical use out of them because, as you know, with all the variables you can change it would take weeks or months to learn anything through trial an error.

                                          This is probably less of an issue for Max users who tend to have had some kind of professional training, but those who use Sketchup for visualisation are at the shallow end of the visualisation pool are largely self trained I imagine. (Along with using amazing resources such as Sketchucation, of course πŸ˜‰)

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                                          • eidam655E Offline
                                            eidam655
                                            last edited by

                                            well, at least i haven't, that's why i opened this thread πŸ˜„

                                            I'm using SketchUp 2017, V-Ray 3.4

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