Dynamic lighting with emissive material?
I'm trying to make a virtual concert in UE4. Recently I've gotten the visuals to be an emissive material, however they only update at buildtime instead of runtime. The images attached are a before/after of building the lighting.
Is there a way to make the lighting update dynamically along with the video material rather than only updating at build-time?
As far as i know, you can only get static lighting from an emissive material, so it is baked in during a build and never changes after that. Dynamic lighting from an emissive would require real-time global illumination, but I'm not sure even UE4's real-time GI solution -- light propagation volumes -- will take dynamic lighting from an animated emissive texture.
I recommend using a dynamic light with a light function, behind your emissive texture, that simply uses a blurred version of the same media to project onto the environment.
answered May 23 '15 at 09:01 PM
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