At yesterday’s live drawing at art class we tried markers! I tried both Kuretake brush pens and sharpies.
The model’s position time varied between 1 and 3 minutes.
I found that I became too fiddly with the brush pens, and a tad cautious with the black sharpie. What worked best for me was to use a lightly colored marker first and then make a few lines with the black the last half minute.
model: Sofi, teacher: Gabor