Ichno

Ichno turns your Blender scene into a technical drawing: orthographic and isometric views, section views, dimensions, title block and bill of materials, exported as vector PDF and SVG.

Made for blueprints and shop drawings: furniture and woodworking plans, interior layouts, product design, 3D printing parts, mechanical assemblies. Print it, send it to a client or a workshop, or open it in Illustrator, Inkscape, Affinity or a CAD tool.

1. 3D Viewport ‣ Sidebar (N) ‣ Ichno tab.
2. Choose what to draw: visible objects, the selection or one collection.
3. Click Make Plan: the PDF opens when it's done.

The drawing is computed by a second Blender in the background, from a copy of your file: your scene is never modified, you can keep working, and you can cancel at any time.

• Front, side and top views, first-angle (ISO E) or third-angle (ISO A) projection
• Isometric view from any corner, or from your current viewport angle
• Clean visible lines from Line Art, optional dashed hidden lines, ISO 128 line weights
• Automatic standard scale (metric or imperial), or a fixed one

• Up to three sections (front, side, top), each cutting plane placed in the 3D View with a live hatched preview
• Cut faces capped and hatched (ISO 128-50), a different spacing for each part, titled "SECTION A–A"
• Cutting plane shown edge-on on the neighbouring view, with arrows and letters (ISO 128-3)
• Optional page with one isometric view per plane

• ISO or ASME dimensioning; each overall size shown once, in mm, cm, m or inches
• Dual dimensioning, e.g. 254.0 [10.00"]
• Chain dimensions for rows of objects, equal spacing combined as 5 × 600 = 3000
• ISO small dimensions: figure and arrows moved outside when they don't fit
• ISO 2768 general tolerances (f, m, c, v / H, K, L, envelope E) with an optional table of deviations

• A4 to A0, Letter, Tabloid, ANSI C and D, portrait or landscape
• One sheet per collection in a single multi-page PDF, each with its own views and scale
• Title block with company name and logo, drawing number, author, date, revisions, custom fields, tolerances and material
• Bill of materials counted by object name, collection or custom property, on the drawing or on a separate sheet
• SVG with layers (VISIBLE, HIDDEN, DIMENSIONS, TEXT, FRAME)

• Blender 4.3 or later, tested on 4.3, 4.5 LTS, 5.0 and 5.2 LTS (Windows, macOS, Linux). Nothing else to install, no account, no internet connection.
• Interface and drawings in English and French.
• Manual: right-click any Ichno setting ‣ Online Manual (F1), or https://github.com/Elyh29/ichno/wiki
• Bugs and ideas: https://github.com/Elyh29/ichno/issues
• Very heavy models (millions of triangles) take a few minutes; use Fast mode for drafts. Manual dimensions between two points and hole dimensions are not in this version yet.
• Free and open source (GPL-3.0-or-later).