Have you guys ever played a game and you place your mouse over an object and the object sorta gets like this little red glow around it? I don't know what to call it... a highlight I guess? How can I program that, or must you use a shader?

That could also be a slightly bigger entity (scale = 1.05 or so) that's ent_created at the same position with the original entity and is set to transparent, its .red is set to 255 and so on.

Wow, what a brilliant idea, I didn't even think about doing that... I'll give that a shot and see how it works for me. TY.