Hi,
Please consider adding anti-aliasing for Material Functions (like “Draw Line 2D”). For texture-based Materials used in UI Material Domain, the lack of anti-alising has the workaround of editing the original texture in an image manipulation program to add blur to the edges to soften the aliasing. However, for UI-domain Materials using Material Functions (such as “Draw Line 2D”), there is no way (AFAIK) to tackle aliasing/jagged edges.
If this is not possible, please consider a different feature request: adding anti-alising to UMG images (materials/textures used in the UI domain, not in the world).
Thank you.