Thanks to all for your good comments.
What about time I spent doing the portrait. It takes 10 days between the day when I started and the day when I published on TG . But it not means that all these days I drew it. Much more time, I spent on this portrait, I was analyzing what I did , used different variants and planning the way of future work. Mechanical part of drawing is maybe 20-30 hours.
This way of drawing need vector graphic program because the one gives full control over every part of a work. Also It is mad to change brush properties for every stroke. In Xara it is easy to do it with shapes and lines.
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