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Using Emissive lighting on Render Target materials.

Hello. I'm currently making a sort of TV wall. Really big. So I was wondering if it was possible to use the Render Target texture as emissive to illuminate the space (it's an enclose space with no exterior lighting). I can get the emissive to work properly with LPVs (I need it to be dynamic), but I would like the Render Target to determine the brightness of the scene (if the render target captures a dark scene, then the room would get darker). I've tried faking it with light functions, but given the aspect ratio of the wall, the sphere/capsule of point lights and the cone of spot lights don't make the cut.

In short, how can I turn the Render Target texture emissive as well? If not possible, how could I fake the screen effect?

Product Version: UE 4.11
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asked May 19 '16 at 06:29 AM in Rendering

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Artistical
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Found the answer on the forums: It's necessary to have a constant Directional Light to feed the LPV. Since I was trying it on total darkness, there was no way I could see it.

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answered May 19 '16 at 06:38 AM

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Artistical
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