This is very important to me and I'm glad it can help you in some way.
Working in Zbrush, these high quality alphas will be a great tool to help bring your creatures and environments to life and speed up your concept or work.
38 Bark and 13 Ring tree, black and white .psd files, specifically created and collected with creating realistic and interesting surfaces.
Hand sculpted alphas and other digitally generated.
In the package you will find the 51 Alphas brushes, and instruction video to open correctly
My version in zbrush is 4r7