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Emissive lighting through translucent object

I am trying to set up a scene similar to this:

reference photo

Basically, I want the bulb's filament to light up the scene. I set the filament's material to emissive and set the glass shell to 0.1 opacity. However, I can barely see the filament up close.


What am I missing here? I am taking baby steps here, would really appreciate it if someone can point me in the right direction :)

Product Version: UE 4.14
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asked Aug 17 '17 at 08:18 PM in Rendering

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avatar image subir Aug 20 '17 at 07:01 PM

Want to note here that the surface area of the filament was too low for the emissive glow to show up. I fattened up the mesh and got better results.

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you may need to crank up the emissive power. use a multiply node on your emissive map to increase the brightness.

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answered Aug 18 '17 at 07:59 AM

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Nuclear Arbitor
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avatar image subir Aug 18 '17 at 08:02 AM

I have tried bumping it up to 50000, didn't really help :-/

avatar image Nuclear Arbitor Aug 18 '17 at 08:08 AM

i wasn't paying enough attention when i answered. i suggest you place a point light in the scene. by default, emissive textures do not light other objects. you could also try this: https://www.youtube.com/watch?v=CtyNXjN_HFk

avatar image subir Aug 20 '17 at 06:58 PM

Thanks! I went with your suggestion and added a point light. Getting close to what I wanted. Still have to figure out the reflections and shadows thru the translucent material. wonky shadows

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