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    V-ray questions

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    • thomthomT Offline
      thomthom
      last edited by

      V-Ray UV Size:
      If you have a texture in your SU material, and your material is set to 5000mm,1000mm, then UV of 1.0,1.0 would match SU's. If you set the UV to 0.5,2.0 then it'd equal to 2500mm,2000mm.

      If you have no texture in SU, then a UV of 1.0,1.0 is one inch, 25.4mm.

      What I did with the last bumpmap that I posted, since it's 4x4 tiles, I wanted each tile to match the size of the SU texture size, so I set the UV tiling to 0.25,0.25.

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

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      • S Offline
        sepo
        last edited by

        Sorry about my ignorance but can you show how bulge diffuse looks like.

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        • thomthomT Offline
          thomthom
          last edited by

          How the blended bumpmap looks like in the diffuse channel?

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

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          • S Offline
            sepo
            last edited by

            😳 You can tell I am total newby with Vray... I thought it was actually diffuse texture.
            Thanks

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            • thomthomT Offline
              thomthom
              last edited by

              I do have a diffuse texture in the material. (http://www.sketchucation.com/forums/scf/viewtopic.php?f=80&t=18096&st=0&sk=t&sd=a&start=30#p149199) But that's only to create UV co-ordinates. The diffuse layer is completely transparent. You only see the reflection layer which is distorted by the bump.-

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

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              • A Offline
                AcesHigh
                last edited by

                What? The default VRAY unit is an inch?? I thought VRAY was created by europeans.

                Thom, I gave up on exploding my model. I will try it next time. My model was too big with too many glass components... the building is 130 floors tall, and I had to select 5 floors each time and even so it would take over 30 minutes to explode them...

                I tried using the bulge in a teste model... Ive run into trouble, probably a bug... bulge would work in the first render... then usually it would look too small. I would try setting it correct then suddenly disappeared! No bulge anymore. Even returning to the initial settings, I would never see it again!

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                • thomthomT Offline
                  thomthom
                  last edited by

                  @aceshigh said:

                  What? The default VRAY unit is an inch?? I thought VRAY was created by europeans.

                  I'm not sure if it's V-Rays default unit. Damien has claimed it uses the model units. He might be correct in one way, but wrong in another. Sketchup uses inches internally. Always. So if V-Ray uses the SU units, without taking into account the model display settings, that would explain why we have to enter units in inches in V-Ray.
                  So technically, V-Ray uses the model units. But not from an end user's point of view.

                  Thomas Thomassen — 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:

                    @aceshigh said:

                    What? The default VRAY unit is an inch?? I thought VRAY was created by europeans.

                    I'm not sure if it's V-Rays default unit. Damien has claimed it uses the model units. He might be correct in one way, but wrong in another. Sketchup uses inches internally. Always. So if V-Ray uses the SU units, without taking into account the model display settings, that would explain why we have to enter units in inches in V-Ray.
                    So technically, V-Ray uses the model units. But not from an end user's point of view.

                    i begin to believe that its actually inches. i began redoing and resized my map in inches 2 inchesx inches or 1 inch by 1 inch and its just fit with the scale. aslo after doing the displacement. they are more exact in inches (2.54 cm)even though my measurement that im using is cm and not inches.

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

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                    • thomthomT Offline
                      thomthom
                      last edited by

                      Yea, in V-Ray you have to use inches.

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

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                      • soloS Offline
                        solo
                        last edited by

                        Okay new Vray glitch...

                        I have a .skp model on one machine complete with materials and they are optimised for vray, however if I try open that model on another computer there are no materails in the vray material dialogue...am I missing something?

                        http://www.solos-art.com

                        If you see a toilet in your dreams do not use it.

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                        • thomthomT Offline
                          thomthom
                          last edited by

                          Hm... I tried loading the same file twice on the same computer, and I saw no issues. I'll see if I can install the trial on my other computer and try to open on two separate machines.

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

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                          • soloS Offline
                            solo
                            last edited by

                            Thank you very much, I would not bother but I have a model that took me ages to make before my computer died of a static shock, fortunately I had saved it to my server but now i't's useless as it has over 70 textures yet in Vray it only shows one.

                            http://www.solos-art.com

                            If you see a toilet in your dreams do not use it.

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                            • thomthomT Offline
                              thomthom
                              last edited by

                              Hm.. Sounds like a bug. You could send the model to ASGVis and have them take a look at it.

                              What you could do, if most the materials where plain material with only a diffuse layer, is delete the V-Ray attributes in the model and then reload the model. That might force V-Ray to reread the materials.

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

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                              • soloS Offline
                                solo
                                last edited by

                                I doubt it's a model bug as all my models that I have previously modelled and rendered with Vray have the same issue.

                                The model in question had more than diffuse I had bumps, reflections, etc.

                                I think it may be a texture mapping issue, a mydamhihad it's texture folder in a different location to my new one.

                                http://www.solos-art.com

                                If you see a toilet in your dreams do not use it.

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                                • kaluK Offline
                                  kalu
                                  last edited by

                                  @solo said:

                                  Damien, thank you for taking the time out to explain some of the technicalities of Vray and welcome to SCF.
                                  It's always a good thing when developers are able to consult and advise on open forum, I know you are very active at ASGvis and glad you have also 'broken the seal' here too.

                                  My next question is regarding displacement (I'm sure that this is a well covered subject on the vray site, but for those who are new or in a deciding capacity as far as render engines goes I will ask my questions here)

                                  I have been trying to master displacement on simple objects before using it on any real projects, I have noticed that it totally kills render times which is expected and in line with most other render apps. I have found a few strange behaviors however, below is a simple SU model with a grass displacement on it, it rendered perfectly the first time but when iI decided to add the white band the render was flat without any displacement, I then made the band a group and rendered and it worked again giving me the result below. My question is... does the grouping of two material adjacent to another where one is displaced and the other not have any significance?


                                  http://img25.imageshack.us/img25/474/vraydisplacementsetup.jpg

                                  [flash=560,340:2adlt0n9]http://www.youtube.com/watch/v/fBDTBV8qNWg[/flash:2adlt0n9]


                                  http://img515.imageshack.us/img515/9630/grassdisplace8.jpg

                                  Hi,

                                  There is anyway that you put for all the settings for this excellent way to make grass in your worm. Kind to step by step to make displacement. I look in the web and asgvis and is not very clear how I can get this awesome results, Please need help ASAP with this I have a presentation in my college.

                                  thanks.

                                  THE ONLY DIFFERENCE BETWEEN FICTION AND REALITY IS WHEN FICTION HAS TO BE CREDIBLE

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                                  • soloS Offline
                                    solo
                                    last edited by

                                    Kalu

                                    I'd love to but I unfortunately was using a trial version which has expired a long time ago, I'm sure that one of the many Vray guys here will be able to help.

                                    http://www.solos-art.com

                                    If you see a toilet in your dreams do not use it.

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                                    • kaluK Offline
                                      kalu
                                      last edited by

                                      @solo said:

                                      Kalu

                                      I'd love to but I unfortunately was using a trial version which has expired a long time ago, I'm sure that one of the many Vray guys here will be able to help.

                                      Hi SOLO,

                                      Thank you for your quick response, I've try and try for 6 hours with many options and I not close to this results. I post the help in ASGVIS forum and I hope someone come out with the exact help.
                                      Also are you the same guy in the PODIUM forum? I am there since they started the soft.

                                      Kalu.

                                      PS. PLEASE any help ASAP I appreciate!!!!!!!

                                      THE ONLY DIFFERENCE BETWEEN FICTION AND REALITY IS WHEN FICTION HAS TO BE CREDIBLE

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                                      • soloS Offline
                                        solo
                                        last edited by

                                        Kalu, I'm sure someone there will be around soon enough to give more help.

                                        Yes, that's me.

                                        http://www.solos-art.com

                                        If you see a toilet in your dreams do not use it.

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                                        • S Offline
                                          steelers05
                                          last edited by

                                          just got a chance to read through this thread...Solo, have you solved your recent problem? I am not sure if i am understanding this completely but it sounds like you took a model to a new computer correct? Vray is very similar to the way autocad handles xreferences (if that sounds familiar?) and you need to have the root files in the original location that they were when you first applied them. I hope that helps?

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                                          • soloS Offline
                                            solo
                                            last edited by

                                            Steelers, I did actually solve it, but that's in the past as I was running the trial version, maybe when the economy picks up or I will look into spending the money to buy Vray 2.

                                            http://www.solos-art.com

                                            If you see a toilet in your dreams do not use it.

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