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WMF at a glance
WMF
The original WMF specification was published in the Windows 3.1 SDK documentation in 1992. Aldus Corporation independently added a 'placeable' header for device independence, which Microsoft later incorporated in Windows 2000. The format specification was republished in 2006 under the Microsoft Open Specification Promise.
EXR at a glance
EXR
OpenEXR came from film-production needs at ILM and then evolved into an open industry format that spread across rendering, compositing, and broader high-end image pipelines.
Format comparison
| Feature | WMF | EXR |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 2003 |
| Inventor | Microsoft Corporation | Industrial Light & Magic |
| Status | legacy | active |
| 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 WMF
- Your source file is already in WMF.
- Preserve source expectations before exporting to EXR.
- WMF is commonly used in vector workflows.
When to use EXR
- Your target workflow expects EXR.
- Improve delivery compatibility with EXR.
- EXR is commonly used in image workflows.
FAQs
Why convert WMF to EXR?
Convert to EXR when the image needs high dynamic range, floating-point precision, render passes, or linear-light compositing.
It is ideal for CGI, VFX, and advanced HDR production pipelines.
What changes when converting WMF to EXR?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to EXR removes vector scaling.
What should I review after converting WMF to EXR?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.