Is there a way to draw UI line or trail? and adjust the width of it at runtime?

Iā€™d like to do two things with a UI line component.
1A) Draw a line where the user has been 1B) Convert the line where user has been into a 2D polygon to show the outline of the area visited.
2A) Define a line or trail on a map with visibility to the users 2B) Adjust the width of the line or trail at runtime.

Are there currently 8thWall tools to accomplish that?

Hi, welcome to the forums!

You certainly can do this with three.js, our renderer. You can take a look at our World Effects sample project that shows how to access THREE from the window.

https://threejs.org/examples/?q=line#webgl_lines_fat