Creating a blacklight in Unreal 4?

Development Rendering
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1

I’m trying to create a flashlight that toggles between a normal flashlight and a blacklight. I essentially want to make it so that whatever the light touches, the texture changes. As this is something I’ve not done before, what would be the best way to implement it?

2

Try to start from here http://www.tomlooman.com/disneyfaciliershadow/

3

Did you found a solution and could share some tips?

I need something similar. The problem for the light is not the switch of lights or make it look like blacklight, but I can’t handle to make textures changing in the light at the moment.

Also would be nice to be able to write something on a texture, which only shows up (glowing) when it s lit by blacklight.