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Translucent Diffusing Panel

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  • July 28, 2022 at 4:57 am #15346
    jason wilde
    Participant

      Hello Blenders

      Again I have tried to work this but am going down rabbit holes watching unrelated videos. 

      So the panel between Suzzane and my light is blocking off that light.

      How can I make that panel translucent so that it allows diffused light to travel through. 

      I’m trying to emulate real world diffusion panels, or scrims, which are placed in front of a light to soften and shape that light.

      They come in different strengths or thicknesses, 0.5. 1, 1.5 and 2 stops etc. The thicker the panel the more diffused the light – which is used to make gradients across surfaces.

      Thank you for any help.

      My very best,

      Jason

      Screenshot 2022-07-28 at 10.32.53.png

      July 28, 2022 at 5:32 am #75044
      Martin Bergwerf
      Participant

        Hi Jason,

        I’d use Cycles for this. For instance a setup like so:

        Diffuser.png

        I’m sure that you can get the effect you want in Eevee as well, but it would be a completely different approach.

        Do not use a Translucent Shader for this, no matter which Render Engine, because it doesn’t take the thickness of the ‘diffuser’ into account.

        July 28, 2022 at 7:26 am #75045
        Omar Domenech
        Participant

          I think for that you’re better of using IES lights, or plugging in a texture into your lights. JL did a short lesson about it here:

          https://cgcookie.com/lessons/texturing-lights-with-ies-data

          I’ve seen people using softbox textures that emulate the effect very well and not having to waste light bounces and calculations trying to emulate for real in the render engine.

          August 2, 2022 at 9:55 am #75046
          jason wilde
          Participant

            Thank you Omar. I hope you are very well.

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