What is the best way to draw such frames?
I’d use a grayscale texture in a material. If you are short on texture memory then it’s a simple enough shape to make procedurally. (Let me know if you want an node graph for that.)
You can use that material in a MaterialBillboard component. If you want to add some basic animation then you can use it in a particle system: a particle can fade in and out, move up and down, things like that. With UMG you can make the frame part of the UI.
Yes, I`d like to look at your material, please. Now I am making this frames using HUD class. I draw them in photoshop and all simple animations and positioning I am doing in HUD.
If you are happy with the frames you made in PS then you are pretty much set:
If you want to change the look of the frame on the fly then you might use something like the following node graph to draw it:
Thank you for the material. I`ll try to experiment with it.