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UMG UI Textures with jagged lines

Hey guys,

I’m currently working on a menu based off of a UI concept made in Adobe Illustrator.

In the concept, we have relatively smooth lines in the interface (attachment 1).

I’ve made similar lines in Photoshop, making the whole UI mockup as 2560x1440 texture, and imported into UE4.

However, I get jagged lines when viewing my UMG widget even at 1920x1080 (attachment 2).

I understand that it might have to do with the fact that I’m not importing factor-of-two texture, so the mipmapping can’t help.
Should I try adjusting the texture and making it 2048px cube, for example? Will this fix the lines or is there another solution for such UI texture issues?