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    Weird Light Particles showing up in my Vray renderings

    Scheduled Pinned Locked Moved V-Ray
    renderpluginsextensions
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    • T Offline
      thenajsays
      last edited by

      http://www.freeimagehosting.net/newuploads/h1wn6.jpg

      can anyone help or offer any guidance?

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      • BurkhardB Offline
        Burkhard
        last edited by

        What about systemspecs?
        What about version numbers?
        What about screenshots?
        What about models?
        What about detailed explanations?

        Do you really think someone could help with no informations from you?

        [http://www.ia-plus.de(http://www.ia-plus.de)]

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        • T Offline
          thenajsays
          last edited by

          strange, the image didn't post...

          https://lh4.googleusercontent.com/-2K-rSuI24dU/UH72I-aaYEI/AAAAAAAAANo/uwYEN6eU4NE/s1600/Scene%2B01.jpg

          sketchup 8
          vray 1.41 (i think)
          have light as an emissive material currently, but I've experimented with various setting, IES lights and spot lights, and I still see the same issue.

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          • stefanqS Offline
            stefanq
            last edited by

            In "indirect illumination" disable "Refractive GI Caustics"

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            • andybotA Offline
              andybot
              last edited by

              if you are lighting only with emmissive materials, you will have that effect, there's not really any way to avoid it. Try adding some rectangular lights and set them to "invisible" and your lighting calculation will work much better.

              (also - could a moderator move this to the vray section?)

              Andy

              http://charlottesvillearchitecturalrendering.com/

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              • T Offline
                thenajsays
                last edited by

                thanks so much!

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                • V Offline
                  valerostudio
                  last edited by

                  Andy is right, you cannot use emmissive materials to light a scene currently. Hopefully this is another thing that gets addressed in the next release. You should only use emmissive materials to give the illusion of something being lit, like a TV screen for example.

                  Use IES lights in the recessed lights and supplement your lighting with some rectangular lights. You could also use an HDRI for your GI and BG if you wanted a nice night render.

                  http://www.hdrlabs.com/sibl/archive.html

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                  • panixiaP Offline
                    panixia
                    last edited by

                    @thenajsays said:

                    I've experimented with various setting, IES lights and spot lights, and I still see the same issue.

                    he said he has the same problem with other lights, so could'nt it be the irradiance map settings being too low?
                    sometimes i had similar output and solved the problem raising a bit irradiance map subdivs and samples..

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                    • andybotA Offline
                      andybot
                      last edited by

                      @thenajsays said:

                      have light as an emissive material currently, but I've experimented with various setting, IES lights and spot lights, and I still see the same issue.

                      Did you try rendering the scene with no emmissive material? Try to get your lighting right without the emm. mats to make sure you have enough light in your scene.

                      @panixia
                      Increasing the HSph. subdivs in the irradiance map settings will help reduce the splotchiness, but it won't fix the emissive "sparkles" that we see.

                      http://charlottesvillearchitecturalrendering.com/

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