137 High Quality Fractals Alphas for ZBrush
2048 x 2048 pixels every alpha
You can use for create your own Brushes, or can be use with displacements in your models, to make mask for paint or sculpt.
As every alpha is high resolution, so you can crop it, and make new alphas or can blend it (in photoshop for example) and make new ones.
Ideal to make real life surfaces details, rocks, mountains, animals and creature skins, etc.
if you want to see what you can do with those alphas, download for free the gcFractals Alphas Showcase in https://gum.co/xjbSs