Uhgh...you have you ever seen a old tv that has a bad antenna so you can't see the image properly and the image is constantly out of focus with static?
This.
Yeah. When things are out of focus, they blur with their surroundings. That's exactly what I just said.
Something like adjusting focus are not possible without either engine changes or some hacky script thing that would cause lag if used in large amounts.
However, when the brick would have a jittery moment, that is possible, but would likely have to be a cross between a shape and color fx. Additionally, naming it "Distorted" works, but it is a very general term. There's probably an official term for exactly what you're suggesting.
