Glow in the dark material?

Development Rendering
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1

Hey guys.

So… yea, I would like to make a material which “glows in the dark”. In other words, when there is no light, it will either
a) Have an emissive glow on certain parts
b) Display a different material instead (which would have the glowingness)

Is there a way how I can do that? Or are there any materials which already do that?

The main reason I need it for is to be able to make the walls (which are BSPs) in my game visible when the walls are not lighted, but at the same time I don’t want the walls to be glowing all the time.

Note: The previous question i found was never answered, and I didn’t want to necro it, which was why I created a new question.

Edit: Ah, by the way, I would like to avoid using post-processing if possible, because I am already using the post processing buffer for something else.

2

If I understand your question well, you should simply be able to use the “Emissive Color” channel of the material by plugging a color or texture node in. You can see a demonstration here.