Allen is correct. As far as I know Karin and I are the only artists that use this technique on the forum. What makes it difficult, as compared with other techniques, is the fact that you can not explain in a few simple sentences what should be done next. It's often an intuitive thing, something that comes from many years of struggle.
Yet for me it gives a pleasing result and is adaptable to other techniques. But it's certainly not for everyone, especially those starting out who should first learn a more direct method.
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