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Interesting findings on lights

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  • Interesting findings on lights

    I had one of my "What happen if..." moments. Usually that leads to some form of destruction.

    Today's "What if..." was: "What happens if you edit the geometry of an Omni light"?

    Answer: Nothing! It still works as before. I removed parts of the geometry and I also replace all geometry. No affect on the light itself.

    Additionally: I converted the V-Ray Light group into a Component. It still rendered. What's more interesting; the point of the light source is the component axis. I changed the geometry of the light to a long rectangle. As I moved the Component's axis the light would move as well.

    Even more: You can copy the light around, and the copies will still work. However, when you edit the V-Ray properties of one light, it does not affect the rest. I made three copies of a light, and I was able to set different light colour to each of them.

    However, when I later edited the axis point of the component, only the first light seems to work.


    What's the point you ask? ... well... not sure to be true. Just found it interesting. It does allow you to change the look of the V-Ray light to something else, if you should prefer that for whatever reason. You could edit it so it looks like a lightbulb so so it doesn't look out of place if you need to present your model in pure SU mode. (Or just hide it...)

    Since each component instance of the lights had it's own settings you still have to put the Light object inside another component if you want to edit many point with only one set of change.



    But what I was actually testing when I stumbled over this was, does the size of the Omni light matter? Yes it does. I had thought it was only the Rectangular light where the size had an impact on the light emitted.
    Please mention what V-Ray and SketchUp version you are using when posting questions.

  • #2
    Re: Interesting findings on lights

    Correction: adjusting the axis does not disable the copied lights. I just tried it again. There must the something else that caused it initially.
    Please mention what V-Ray and SketchUp version you are using when posting questions.

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    • #3
      Re: Interesting findings on lights

      ThomThom

      Building on your "What happen if..." moment, I tried it out.

      It seems that if you just make a light into a component, then editing the intensity of one of them doesn't change the others - surprising.

      However, if you include a light within a component, say a light fitting, and copy it, then editing the intensity of the light within that component does change the others - maybe more surprising.
      Sketchup 2015
      Vray version 2.00
      www.davidcauldwell.co.uk

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      • #4
        Re: Interesting findings on lights

        I noticed that as well.
        Thinking of it, I suppose it isn't that surprising. The V-Ray parameters for the object is similar to the scale parameter of components, it's applied to the instance, not the prototype itself. Each instance keeps their own setting.




        hmm..... What happens if... you cut a hole in a Rectangular Light? ... Gotto try that when I get home.
        Please mention what V-Ray and SketchUp version you are using when posting questions.

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        • #5
          Re: Interesting findings on lights

          Ok, I couldn't wait until I got home. So quick to test.

          Answer: it breaks.



          But interestingly, Infinite planes doesn't break when you cut holes in it. But the hole is not visible. But you can't convert it into an component.
          Please mention what V-Ray and SketchUp version you are using when posting questions.

          Comment


          • #6
            Re: Interesting findings on lights

            Originally posted by dcauldwell
            ThomThom

            Building on your "What happen if..." moment, I tried it out.

            It seems that if you just make a light into a component, then editing the intensity of one of them doesn't change the others - surprising.

            However, if you include a light within a component, say a light fitting, and copy it, then editing the intensity of the light within that component does change the others - maybe more surprising.

            thom& david. tks 4 this. surprising, well antoher area to discover and extend our creativeness
            http://www.nomeradona.blogspot.com/
            http://www.sketchupvrayresources.blogspot.com/
            http://www.nomeradonaart.blogspot.com/

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