Semi, because I did my sketching in Caldwell, Idaho across from the local florist . . . flower shop Bayberries. Caldwell is more of a town than a city, hence the reluctance to call it urban sketching. I used gouache and some watercolor as I painted in the street behind my pickup to block the wind. sI sketched in my hand made sketchbook. The pages of which are 7.5 X 11, Arches 140 lb sewn into a leather cover that opens fairly flat. I love it, but it is a bit cumbersome.
The first dketch was pretty loose and I used just the pigment and bruch to sketch. I started with a very yellow under-painting , just because I wanted to do so.
I left out some things and my scale was pretty wild, so I did another on the opposite page, drawing with pencil to get my bearings. I added some trees and used a more water to thin the qouache. That caused transparency, letting the underpaint show through which I enjoyed. I added the building behind to help with the scale and perspective.
Fun outing and I am looking forward to some better weather to go out again . I received my casein order from the artarama and I am excited to try using the casein for painting outside.
James Gurney has many videos about painting/sketching with casein. I got a kick out of watching him and listening. Might be worth a look. Youtube of course.