I'm trying to create a brush the makes little squares in p-shop. I tried several times to do the whole thing in p-shop but whenever I change the size of my brush after the fact, the edges of my square are all pixelated. I've even tried creating a vector object in illustrator and copy pasting it in p-shop to create my brush. Is there a way to create the kind of brush I'm attempting and still have crisp edges on my squares?
     Thanks[This is the shape I'm trying to create][1]


  [1]: https://i.sstatic.net/6Rpu6.png