You'll find very few secrets in the knife world. A few makers think they have them, but it isn't generally so. Ask a maker how he came up with a pattern and most will be delighted to tell you.
The big thingh is translating the knowledge into practice. Upsetting a billet can be described, but the first several tries may be less than successful. It's a matter of persistance and attention to detail. And letting the billet soak at temp.
A common failure by those learning damascus and intricate patterns are due to impatience.
Check out Jim Hrisoulas' books, the Master Bladesmith and The Pattern Welded Blade.
Gene