Free architectural drawing, software interface, modern minimalistic design, flat icons, toolbar, menu, canvas, grid system, snapping tools, ruler, protractor, pencil, eraser, color palette, swatches, gradient, shadow, 3D modeling, rendering, realistic textures, glass, metal, wood, stone, futuristic, sleek lines, neon lights, cityscape, skyscraper, metropolitan, urban planning, blueprint, section, elevation, perspective view, isometric projection, orthogonal drawing, architectural visualization, ambient occlusion, global illumination.