Adding Outlines

i saw on few good pserver they had this - https://imgur.com/a/Gvjy0BW
i first saw it on loe then rotf so this gotta be good
ik its client sided but how to add them?

There was a thread about it like 2 days ago.

TextureRedrawer.as i think would be what youre looking for, but pretty sure there is already outline for textures added, you can go there and see for yourself though and i guess play around with it (color, thickness, etc)