How do I create Brushes that are not blured?

[Diamond]

That's a problem that you're really not going to get away from using a raster-based program like PS; the brush is only crisp and sharp at the size it was originally 'built' at. To scale a brush up or down in size and still maintain crispness, you'd need a vector-based program like Illustrator.

[Hai-Etlik]

That's a problem that you're really not going to get away from using a raster-based program like PS; the brush is only crisp and sharp at the size it was originally 'built' at. To scale a brush up or down in size and still maintain crispness, you'd need a vector-based program like Illustrator.

Even if you use vector symbols, scaling them by different amounts will likely result in a visual mismatch in the level of detail, although this varies with the symbols and the style. When I did the symbols for my Britannia map for instance, I was very careful to draw them all at the same size using the same pen, and then scale them by the same amount after vectorizing.