Creating scalable UI elements/images?

Hi!

I want to create certain UI elements, such as crosshairs, markers, etc, that can be flexible in terms of size, rotation etc.

For example, a hexagonal marker with a border of 1 pixel. One way to create t$$anonymous$$s would be to use a sprite component. However, the problem with t$$anonymous$$s is if you increase the size of the image (e.g. when the object gets closer), the t$$anonymous$$ckness of the marker will increase. It's also not possible to use the border feature as the hexagon is not rectangular.

Another method could be to use 6 separate line renderers, but t$$anonymous$$s is annoyingly complicated and also would start adding overhead when there are multiple markers being updated on screen.

I would like to know if there is a way in Unity to create images through script (e.g. for a hexagon I could write a script that draws the correct lines), or if there is some other way to ac$$anonymous$$eve t$$anonymous$$s effect? I remember reading somewhere about being able to write renderers, but I can't remember where.