PostScript for CAD Plotting: When It Helps and When It Does Not
PostScript is a page-description/rendering path supported by some large-format devices and production workflows. It can be valuable, but it should be chosen because the exact plotter supports it and your test sheets benefit—not because it sounds more 'professional.'
In one sentence: PostScript is an alternate rendering/output path, not an automatic CAD-quality upgrade.
What the term means in a CAD plotting workflow
AutoCAD can use PostScript-oriented printer drivers on supported hardware or configure a PostScript/EPS file PC3. Some modern technical plotters also include PostScript/PDF processing in certain variants.
Why it matters for AutoCAD users
- PostScript can change font, transparency, raster and complex-PDF rendering behavior.
- Some plotters require a specific PostScript option/module or model variant.
- A raster/system-driver queue and a PostScript queue may expose different paper or quality settings.
Related CADPlotting guides: System Printer vs Nonsystem Plotter in AutoCAD, CAD PDF & Publishing Guide, and Plot Styles & Lineweights Guide.
Practical decision workflow
Step 1 — Confirm hardware support
Where: Manufacturer support
Do this: Check exact model/option.
Check: PostScript is actually available.
Step 2 — Install supported PS driver
Where: OS
Do this: Create clearly named queue.
Check: No confusion with raster queue.
Step 3 — Create matching Page Setup
Where: AutoCAD
Do this: Use same sheet/plot style.
Check: Comparison is fair.
Step 4 — Plot calibration sheet
Where: Raster vs PS queues
Do this: Compare text, linework, images and time.
Check: Real difference is known.
Step 5 — Standardize one default
Where: CAD standards
Do this: Keep alternate path only for proven use cases.
Check: Users know when to use which.
Typical problems and the first place to look
| Symptom | Most likely hardware/driver layer | First check |
|---|---|---|
| PS driver won’t print | Missing module/unsupported model | Check device configuration. |
| Fonts differ | Rendering path | Compare font handling. |
| Paper list differs | Driver media catalog | Use path-specific Page Setup. |
| PS slower/faster on certain jobs | Processing path | Choose by tested workload. |
Practical example
A production plotter exposes both raster and PostScript queues. Send the same known-good PDF/AutoCAD calibration sheet through both and compare fonts, transparency, raster content and processing time. Choose the office default from evidence, not from the PostScript label.
Good office standard
Name queues clearly, e.g. Device-Raster and Device-PS, and document which is the default for CAD issue sheets.
What this does not mean
PostScript does not replace CTB/STB, Page Setup, viewport scale or physical margin verification.
Official references
Frequently asked questions
Is PostScript always better for CAD?
No. It is an alternate rendering path. Choose it only when the exact device supports it and your calibration sheets show a real benefit or requirement.
Should raster and PostScript queues share one PC3 name?
No. Name the output paths clearly so users and Page Setups cannot confuse them.
What content should I compare between paths?
Use text/fonts, vector linework, transparency, raster images, lineweights and processing time on the same calibration drawing.
Explore more in CAD Printers & Plotters Guide.