I worked on this my style last 3-4 years. A lots of people in commets asked me to show how i make that oily strokes. Well, glad to introduce you my video tutorial ((23 min) on russian with english subtitles) about my digital oil painting technique - IMPASTO.
Compability only with Photoshop (ver. 18 and higher) and not for beginners, i guess. It's my first full video tutorial, it was hard. Hope you find it useful.