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Receiving shadows on Emissive Materials

I am working on a shader of sorts which uses material parameters, but it uses mostly Emissive properties due to lit shading not giving the look that I want.

I am wondering if there is any way that I can get self-shadowing and shadows based on the level lighting to work with Emissive materials without having to switch to a dodgy post-process solution entirely, or without having to spend large sums of time figuring out how make a shader model which uses emissive but accepts shadows

Product Version: UE 4.17
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asked Oct 10 '17 at 02:27 PM in Rendering

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BesuBaru
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2 answers: sort voted first

Well, Shadow is absence of light. So it is mutually exclusive with emissive. You could try achieving the same effect with a bright basecolor. If that is not enough, you will need to alter the shading model itself.

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answered Oct 10 '17 at 06:35 PM

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Deathrey
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http://www.tomlooman.com/disneyfaciliershadow/

This requires you to use the forward renderer, but gives you direct access to the shadow information on a per material basis.

https://pbs.twimg.com/media/DLQ5UFuU8AAqyAW.jpg

You can use it to achieve things like that, or just to get standard shadows on emissive materials.

nep em all up

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answered Oct 11 '17 at 02:22 AM

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Selentic
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