Everyone has their own way of boosting their writing. Some write a detailed outline, some ‘cast’ their characters, picking film stars or models as the faces and bodies of the people they are writing about.
I don’t do this – or not often – because I draw them instead. I have a very sharp visual image of everything I write about. Sadly my artistic ability isn’t up to depicting the scenes as accurately as I would like but I try and have a good deal of fun doing so.
Here is my mental image of Cynfal riding his ‘sheep’:
These days the idea of a six foot man riding an 11 hh pony would be considered cruel. In those days they had far fewer qualms.