A white line or halo round icons in Unreal Engine might be brought on by anti-aliasing, which is a method used to easy out the perimeters of objects. Whereas anti-aliasing can enhance the general visible high quality of a scene, it may possibly additionally create undesirable artifacts like white strains round icons. To take away the white line from icons, disable anti-aliasing for the icon texture. This may be finished within the texture editor by setting the “Anti-aliasing” property to “None”.
Disabling anti-aliasing for the icon texture will end in sharper edges on the icon, however it could additionally trigger the perimeters to look jagged. To keep away from this, use a better decision texture for the icon. The next decision texture may have extra pixels, which can assist to easy out the perimeters of the icon with out the necessity for anti-aliasing.