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    Lighting trouble from emissive material

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    • M Offline
      masrularief
      last edited by

      hi everyone, i have some problem here...would somebody help me...please
      i tried to rendering a room with some cave light using emissive material but im not very satisfied with the result. ive upload the picture...

      http://i56.tinypic.com/rs8tqf.jpg

      see that red rectangle...on the left rectangle, the light is more like a fire, but it have a different result when the wall is white, the light is so smooth. *what must i do to make the light smoother on the wall?either in white or black wall?
      on the right rectangle...the render result seem so bad, the picture looks like i drawn it with watercolor...what must i do to make it smoother?

      thx 😄

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      • K Offline
        KarinaGM
        last edited by

        maybe the emisive mat is intersecting other geometry.
        Are your blacks 100% black and whites 100% white? If so, make it 95% or so
        Also the tv looks too bright. If it is emiting, lower its value

        **"Aquel que sacrifica un poco de libertad por seguridad, no se merece ninguna y terminará perdiendo ambas"

        -Benjamín Franklin.**

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        • M Offline
          masrularief
          last edited by

          hmmm...sorry..newbie talking.."what do u mean in "black" or "white"? *sorry... 😞
          my emissive mat is not intersecting w/ other geometry,but i put it in one group w/other material (is that okay?*i'll try it)
          btw, thx karina 😃

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          • K Offline
            KarinaGM
            last edited by

            Grouping an element won't avoid intersecting. Make sure that the emitter mesh is not crossing any other surface.

            When I talk about black or white that's exactly what I'm talking about. I don't know what software are you using to render, but you have to check that the color assigned to, for example, the wall, is more like a very light gray or beige, and not white (RGB 255,255,255) that does not exist in nature.

            Also, depending on the rendering software you are using, you can use a higher preset, or an unbiased.

            **"Aquel que sacrifica un poco de libertad por seguridad, no se merece ninguna y terminará perdiendo ambas"

            -Benjamín Franklin.**

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            • M Offline
              masrularief
              last edited by

              o i c...thx karina i'll try it...
              btw i'm using vray for sketchup 1.49
              thx 😉

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