CAD Modelling for Blender

Overview And Key Functions

Construction Lines is a tool for accurate CAD style modelling. Build snappable guide points and edges, draw lines and primitive shapes in place, automatically create faces in closed geometry, precisely move, duplicate and rotate geometry around a scene and cut-through meshes with extrude.

Guide edges and points allow for a construction workflow where guides are set and models are then constructed within these guides. The guides won’t interfere with model geometry and can be toggled off and on when required. Guide edges will disappear when working outside of Construction Lines and neither Guide Edges nor Guide Points will be rendered.

Construction Lines allows for rectangles, circles, and arcs to be drawn in place from precise snap points on existing geometry or guides. These can be drawn from anywhere on a 3D model without the need for Blender’s 3D cursor to define an Add location. Drawing shapes onto existing faces will automatically cut into the existing face.

Construction Lines works seamlessly between Object and Edit modes in Blender.

Installation & Tutorial Video here

Full Documentation and Installation Instructions here

FAQs here

If you come from software packages such as SketchUp this is a perfect way to get started with Blender

NOTE: Construction Lines is currently in Beta and is regularly updated with fixes and improvements. Please also note that Construction Lines is not intended for use on very dense meshes.

Price Reduced in Beta

Blender Products Supported: 2.91 – 4.0

ACCLAIM
“A big thank you for all your effort in creating this sophisticated beautiful add-on”

“Coming from a CAD and 3DSMAx background – this adds alignment and geometry-based snaps missing for so long in Blender. This little tool is saving me a lot of time.”

“Your add-on Construction Lines is becoming a saviour and a game-changer for many SketchUp users”

“Just a must-have, very good!”

FEATURES
Draw Lines

Snap To Grid

Guide Edges & Points

Drawing Shapes In Place

Extrude & Cut-Through

Duplication And Box Selections

Rotation

Cut Into Existing Faces

Precise Object Moving

Feature List

Create snappable guide edges and points
Precisely measure distances
Build rectangles, circles and arcs anywhere in your scene
Draw lines simply by clicking and dragging in the 3D viewport
Lines will automatically fill in faces where geometry is closed
Use lines or shapes to cut into or divide existing geometry
Build lines, shapes and guides to exact size with numeric input (including mathematical operators * / + -)
Limit drawing and movement to the X, Y or Z axes
Auto snap to Perpendicular edge direction and edge extensions
Accurate object movement with snap points or numeric input
Cut into existing geometry by drawing onto existing faces (Construction Lines will automatically create the extra required geometry), allowing shapes to be extruded in and out of existing meshes.
Extrude and cut-through meshes, object rotations, horizontal guides and direction locks.
Grid snapping
Automatic duplication and arrays of objects and geometry (now includes automatic object linking)
Box selection
Edit mode move and delete
Persistent dimensions on guides  

Downloads: show love to dev by purchasing if you can afford it

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Filename: ConstructionLines_0_9_6_8 vfxmed.zip

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THIS POST WAS LAST UPDATED ON 13 June 2026 – NEW DOWNLOAD LINK HAS BEEN ADDED FOR FREE!