@ - well alright… I mean, in theory at least I don’t get it why we’re getting that problems with edges anyway, like you said, no matter how much a terrain is deformed or not, we’re not saying any of the 5 other faces…if tiles are combined well enough…
Actually… I just thought of something… If you know like what merging vertices means in 3D modeling program, like taking two vertices that should exist at same point and turning them into a single vertex… is it possible that you’re seeing that edges artifacts because of that? Like, in editor, when you stack two tile planes so well, their edges should meet and we should get basically two edges occupying the exact same spot? Or are you placing them in a way that two edges lie side by side without every touching them selves? Might be a good idea to have plane tiles for terrain, but combine then while in, ex, Blender and then export the single, combined, merged mesh as a map?
@ - no, nothing is broken, was just curious… 
Since I have zero knowledge about UMG and Slate, and I’m not going to post anything regards to that and instead start studying about both of them…
PS. I’ll be away from my main PC for few days - week… I’m in another city right now, in process of buying a SSD and a second 24’ monitor (yummy) so I won’t be posting anything regarding to models/unreal, except ideas and stuff like that until I get back to my main PC, because laptop can’t handle the unreal madness 