I worked on the kilt some more, then started the skintones and hair.
Reference Photos:
Fantastic Version of this Mini by Spanish painter Alfonso (coloring based on Liam Neeson film character)
Historical tartan of Clan MacGregor (for freehand on the kilt)
Clan MacGregor plate illustration, 1845 (for clothing colors)
Red-haired Scotsman (for skintones and hair)
Other Historical Resources:
Ancient Highland Dress (Scottish Tartans Authority)
Clan MacGregor (Wikipedia)
Robert Roy MacGregor (Wikipedia)