I want to share with you a free Hard Surface Brush Pack, that was created for my personal game project called Utopia. This pack can be used along with ZBrush, Substance Painter, Quixel Suite and other software that support alpha and high maps. I hope that you will find this brush pack useful and it will help you in your creativity!
Oh and, this pack is ABSOLUTELY FREE!
Brush Pack Demonstration: https://www.youtube.com/watch?v=i9l28NHuKtQ
My Personal Page: http://andrewaverkin.com/