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PNM Raw at a glance
PNM Raw
PNM survived because engineers kept needing a no-drama raster family for scripts, fixtures, codecs, and image-processing experiments where the format should not be the hard part.
VDA at a glance
VDA
The Truevision line grew out of EPICenter-era PC graphics boards, and several board names ended up surviving as filename extensions even when the underlying raster structure stayed close to the wider TGA family.
Format comparison
| Feature | PNM Raw | VDA |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 1987 |
| Inventor | Jef Poskanzer | Truevision |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PNM Raw
- Your source file is already in PNM Raw.
- Preserve source expectations before exporting to VDA.
- PNM Raw is commonly used in image workflows.
When to use VDA
- Your target workflow expects VDA.
- Improve delivery compatibility with VDA.
- VDA is commonly used in image workflows.
FAQs
Why convert PNM Raw to VDA?
Convert to VDA when recovering or preserving historical Truevision-era graphics assets, or when normalizing a legacy image collection before moving it into PNG, TIFF, or another contemporary raster format.
What changes when converting PNM Raw to VDA?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PNM Raw to VDA?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.