hey, i just jumped into low poly modeling world and im trying to import small png files into ue. pngs with small amount of pixels (4x4) has compression that it cannot be used. i tried to switch many compression settings but cant get the pure png uncompressed quality 
ok never mind i found the right settings. 2 things needs to be changed. Compression → Compression settings → “UserInterface2D (RGBA)” and Level Of Detail → Texture Group → “2D Pixels (unfiltered)”.