Textures always have to be in dimensions of powers of 2, so a 10x1 texture won't work. You could do a 8x2 texture, although that's tiny. Try a 128x16. Also, probably no need for a lerp, just treat the texture as a mask.
Hello, I'm trying to make a flickering light that i can fully control. So the idea is simple. Lerp node works as some kind of gate. The mask is horizontal panned texture with black and white squares inside. I thought that with this i will be able to "paint" the flickering. The problem is that UE 4 always changes my texture…