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MetaPost at a glance
MetaPost
John Hobby developed MetaPost from MetaFont ideas, and the system later evolved into the MPlib era so TeX and LuaTeX workflows could keep high-quality vector graphics close to typeset documents.
RAS at a glance
RAS
Before today's relatively small set of mainstream consumer image formats dominated everyday use, desktop software, workstations, GUI systems, and early graphics tools produced many specialized raster formats with local importance.
Format comparison
| Feature | MetaPost | RAS |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1994 | 1987 |
| Inventor | John Hobby | Sun Microsystems |
| Status | active | legacy |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use MetaPost
- Your source file is already in MetaPost.
- Preserve source expectations before exporting to RAS.
- MetaPost is commonly used in vector workflows.
When to use RAS
- Your target workflow expects RAS.
- Improve delivery compatibility with RAS.
- RAS is commonly used in image workflows.
FAQs
Why convert MetaPost to RAS?
Convert to RAS when preserving compatibility with historical Sun or Unix image assets.
In most modern contexts it serves as a migration and archive-recovery format.
What changes when converting MetaPost to RAS?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to RAS removes vector scaling.
What should I review after converting MetaPost to RAS?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.