This is an interior sketch done from a picture reference taken by photographer Mike Kelley from a project of Arquitectonica.
This demo shows a process of a quick and bold interior architecture sketch.
The art supplies used:
A3 size marker pad firenze marker paper
For linework I used a Lamy fountain pen and black paper mate Flair M
Markers Stylefile 114, 116, 812, 804, NG5, NG7, NG8, NG9, CG6, CG7, CG8, CG9, Copic W1, W2, W3, W4, W5, W6, Graphit 3110, 3250, 4170, 7109, 7115
Highilights Molotow one4all white pen 127HS-EF