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enter image description here

I use cones to make it look like a spotlight.

Spotlight on the left On the right is the cone.

I would like to add a smear effect or something else to make it look a little more like a spotlight.

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  • $\begingroup$ hello, do you have a picture that would show the kind of effect you are looking for? $\endgroup$
    – moonboots
    Commented Jun 17, 2021 at 8:24
  • $\begingroup$ Hello @moonboots There is no effect I have seen, but I would like the exterior of the cone to be slightly blurred. like that :) vectorstock.com/royalty-free-vector/spotlight-vector-16308346 $\endgroup$
    – Jay
    Commented Jun 17, 2021 at 8:26
  • $\begingroup$ Is this for Cycles or Eevee? In contrary to Eevee, Cycles allows a node setup for lights. $\endgroup$
    – Blunder
    Commented Jun 17, 2021 at 8:30
  • $\begingroup$ @Blunder this is Cycles! $\endgroup$
    – Jay
    Commented Jun 17, 2021 at 8:32
  • $\begingroup$ I believe cycles can render volumetric lights. $\endgroup$ Commented Jun 18, 2021 at 12:27

1 Answer 1

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A trick that you can use to create a blurred light beam, whether you are in Cycles or Eevee, is the Layer Weight node : Mix an Emission with a Transparent, use a Layer Weight (Facing output) as factor, play with the Blend factor:

enter image description here

Layer Weight considers the direction of your normals, in my setup, if the normals are perpendicular to the view, the faces will appear transparent.

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  • $\begingroup$ Thank you for answer. However, the light has to be projected from the back, so I made the cone translucent like in my photo. Can't you give such an effect in this state? I'm new to Blender, so I don't know much about Node. Sorry. $\endgroup$
    – Jay
    Commented Jun 17, 2021 at 8:45
  • $\begingroup$ what do you mean "from the back"? Actually the trick I give can be used in combination with other nodes to get closer to what you want $\endgroup$
    – moonboots
    Commented Jun 17, 2021 at 8:47
  • $\begingroup$ Another object should be visible behind the cone :) $\endgroup$
    – Jay
    Commented Jun 17, 2021 at 8:49
  • $\begingroup$ you can do it with my solution, you can add transparency with another Mix Shader and a Transparent node etc $\endgroup$
    – moonboots
    Commented Jun 17, 2021 at 9:00
  • $\begingroup$ Thank you for the advice ! I will try :) $\endgroup$
    – Jay
    Commented Jun 17, 2021 at 9:10

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