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Render the beam of a spot light in fog?

I need to achieve this effects with a bunch of spot lights used by multilayer players flash lights. The Light Beam needs to show up on the fog. I could always go with a mesh with light emission but I was hoping the spot lights would have an option.

This is the effect visualized. http://cdn.visualnews.com/wp-content/uploads/2013/12/lights-4.jpg alt text

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asked Dec 08 '14 at 06:42 PM in Rendering

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2 answers: sort voted first

Since we dont have volumetric lights yet you have two options:

  • Use a mesh with a specific material - you can find an example in Blueprint Office project in the marketplace

  • Or make use of lit GPU particles, which is not practical for large open environments.

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answered Dec 08 '14 at 06:54 PM

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avatar image TobiasRipper Dec 08 '14 at 09:04 PM

are volumetric lights on a do to list?

avatar image Jacky Dec 08 '14 at 09:56 PM


It may be a directional light only feature though, so dont hold your breath on it.

avatar image TobiasRipper Dec 09 '14 at 12:38 AM

Thank you for the tips. I ended up achieving it using your first suggestion. I used a mesh with a glowing material paired with an inverted Fresnel node to opacity. Softened the edges...

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There is also a bp_godray in the cave examples which makes that look good! You might want to recreate that with a more rounded mesh if needed but on its own itll look great as well!

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answered Dec 08 '14 at 08:07 PM

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