Don't know how to get a certain visual effect

Unity Engine
1

Hey everyone,

I wanted to know how can i do to get the same visual effect as in Xcom2 or Mutant year zero.
When the player can move a character there is a line on the ground to show the limit of the character.

1920×1080 261 KB

I think the circle around the character and the search zone of the enemies are the same effect.

I really don’t know how to get this effect. Can someone help me with that ?

Thanks.

2

This question also concerns me very much.
I think these can be 3d objects with a special shader.