I am making a small scene in Unreal 4. I am having an issue where the colours are getting really messed up when applied on a backface. https://gyazo.com/9b05b44891bbe684ef24babb42973bdd (Messed up version)
2sided sign outputs 1 for the front face, and -1 for the back face. And lerp alpha should be in 0-1 range, thats why it looks off. To get it correctly working with your setup with the lerp, add 1 to the 2sided sign and then divide it by 2, and then plug it into the alpha of the lerp.
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