Working in Zbrush, these high quality tools will be a great tool to help your environment.
This pack can speed up your concept or work.
27 Knots tools, 1 Special Rope Brushe, 01 Tutorial.
The tools are already done, but you can follow the tutorial video and improve your self and change the tool, pretty easy.
This is ZTL files, specifically created and collected with creating realistic and interesting surfaces.
And a video tutorial, how to make new knots or ropes.