Translucent Diffusing Panel

Question Lighting

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,


Screenshot 2022-07-28 at 10.32.53.png

  • Martin Bergwerf replied

    Hi Jason,

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


    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.

  • Omar Domenech(dostovel) replied

    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:

    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.

    2 loves
  • jason wilde(jasonwilde) replied

    Thank you Omar. I hope you are very well.

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