Can I use ʼParallel Projectionʼ for 2D technical drawings in SketchUp?
Short Answer
Yes — in SketchUp, parallel projection is the standard professional method for creating clean 2D technical drawing views because it removes perspective distortion and keeps orthographic views accurate. The most common workflow is to combine Parallel Projection with Standard Views, then send the scene to LayOut for documentation. Limitation: it does not create associative CAD-style 2D linework by itself.
What You Need to Know Before
Warning: If your model is not aligned correctly to SketchUp’s axes, Parallel Projection can still produce misleading front, side, or plan views. A very common failure is exporting a view that looks orthographic but is actually slightly rotated, which causes inaccurate-looking technical drawings.
How to Use Parallel Projection for 2D Technical Drawings
Command: Parallel Projection
Shortcut: None by default
Quick Steps:
- Go to Camera > Parallel Projection from the top menu.
- Then go to Camera > Standard Views and choose Top, Front, Right, or another orthographic view.
- Save the view as a Scene so you can send it to LayOut or export a 2D graphic consistently.
Variables & Settings
Key Setting: Camera > Standard Views
Expert Setting: Standard Views controls whether Parallel Projection is actually usable for technical drafting. If you only enable Parallel Projection without switching to a true standard view, the model may remain in an angled orthographic view, which is unsuitable for professional 2D documentation.
Why it Fails
- Cause 1 (Geometry): The model is not drawn square to the main axes, so front and side views do not represent true orthographic elevations.
- Cause 2 (layers/Locks): Hidden Tags or locked geometry can make exported 2D views incomplete or visually inconsistent.
- Cause 3 (Command/Logic): Parallel Projection only changes the camera type; it does not automatically generate dimensioned drawing sheets or flattened CAD geometry.
Quick Fix & Best Practice
- Quick Fix: Turn on Camera > Parallel Projection, choose a view from Camera > Standard Views, then create a Scene before exporting or sending the model to LayOut.
- Manager’s Verdict: Use this method for presentation-ready orthographic views and SketchUp-based documentation. Avoid relying on it alone when you need full CAD-managed 2D drafting, especially for highly controlled construction documentation.
FAQ
Can Parallel Projection replace LayOut in SketchUp?
No, it controls the view only; LayOut is still the standard tool for sheet-based technical drawings.
Can I export a 2D file from a Parallel Projection view?
Yes, you can export a 2D graphic or use LayOut, but the output depends on your view alignment and style settings.
Why does my technical view still look wrong in Parallel Projection?
Your camera is usually not set to a true Standard View, or the model itself is off-axis.
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