The facture of architectural drawings is not obvious, as the marketing for digital architectural instruments is trying to convince architects, builders, and clients. The facture does not presume what traces, lines, and scores in the drawings are worldly or unworldly, existing or non-existing, physical or mental, subjective or objective. The facture of architectural drawing must avoid such descriptions. The only thing that in the facture must be assumed is that that which is marked, inked, penciled, brushed, chalked, and printed comes into being. Architectural drawing is wholly based on a sapience of a process of materialization, in which the materiality of the lines becomes the carrier of fluid, and generates invisible lines that become lines of thought.