This workshop teaches a complete open-source workflow for creating technical architectural drawings using Blender and Inkscape. The course covers everything from basic Blender UI navigation to producing precise floor plans, adding dimensions, and utilizing architectural symbols from scratch. Students learn how to leverage Blender's precision modeling tools, manage collections and view layers, and configure rendering for technical line outputs. The workflow concludes with exporting drawings in SVG format for final layout, dimension editing, and PDF creation in Inkscape.