How to open .RGBE files on iOS
To open .RGBE files on iOS, iOS may not preview .rgbe reliably; if it doesn’t open in Files/Quick Look, transfer it to a desktop HDR-capable application that supports Radiance HDR/RGBE.
Step-by-step instructions
- iOS may not preview .rgbe reliably; if it doesn’t open in Files/Quick Look, transfer it to a desktop HDR-capable application that supports Radiance HDR/RGBE.
Common issues
The .rgbe file won’t open or is reported as an unknown format
Many applications associate Radiance RGBE with the .hdr extension and may not recognize .rgbe automatically, even if they can read the underlying format.
- Open the file from inside the application (File > Open/Import) and look for “Radiance HDR/RGBE” or similar.
- If the app only lists .hdr, try using the app’s import/open dialog (not double-click association) to force format detection.
- If you control the workflow, export/save again as Radiance RGBE/HDR from the source tool.
Image opens but looks wrong (odd colors or brightness)
Radiance can store HDR data using RGBE and can also use alternative encodings like XYZE; an app may partially support the format or interpret encoding/color handling differently.
- Try opening the file in a different Radiance-capable reader to compare results.
- If you exported the file, check whether the exporter wrote RGBE vs XYZE and whether the target app supports that encoding.
- Re-export from the source tool with a different Radiance encoding option if available.
Export/import confusion: app mentions “Radiance HDR” or “.hdr” instead of “.rgbe”
Documentation and UI often use “Radiance HDR/RGBE” and commonly pair it with the .hdr extension, even when the data representation is RGBE.
- In the app’s export/import options, look for “Radiance RGBE” or “Radiance HDR” (not necessarily “.rgbe”).
- If you need a specific extension for a pipeline, confirm what the receiving tool expects (some expect .hdr for Radiance images).
Security note
RGBE/Radiance files are image data (not a scriptable document format), but malformed image files can still trigger bugs in decoders; open untrusted files only in well-maintained, up-to-date image software.