Architectural Drawings: Use these techniques to differentiate materials and surfaces in architectural drawings, such as the brickwork of a making or the feel of the highway. A thick marker or an ink pen with a broad brush tip is particularly well suited for these kinds of huge black places. https://titushapcp.blog5star.com/37353919/the-smart-trick-of-how-to-draw-with-ink-pens-that-nobody-is-discussing