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Image MIME Reference
Fuji-RAF

Fujifilm RAW Image

image/x-fuji-raf
VS

Pixologic ZBrush PCX

image/vnd.zbrush.pcx
ZBrush-PCX

A complete technical comparison of Fujifilm RAW Image and Pixologic ZBrush PCX — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature Fuji-RAF ZBrush-PCX
Transparency (Alpha) ✕ No ✕ No
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support Yes ✕ No
EXIF Metadata Yes ✕ No
ICC Color Profile Yes ✕ No
Fujifilm RAW Image
image/x-fuji-raf
Extension
.raf
Container Proprietary RAF Container
Compression Uncompressed / Lossless Compressed / Lossy Compressed (Modern firmware)
Algorithm
NoneProprietary LosslessProprietary Lossy
Color Depth 14-bit (Per Channel - X-Series), 16-bit (Per Channel - GFX Series)
Developed by Fujifilm Corporation
Released 2000
Magic Bytes
46 55 4A 49 46 49 4C 4D 43 43 44 2D 52 41 57 20
Full Fuji-RAF reference →
Pixologic ZBrush PCX
image/vnd.zbrush.pcx
Extension
.pcx
Container ZSoft PCX
Compression Run-Length Encoding (RLE)
Algorithm
ZSoft Run-Length Encoding (RLE)
Color Depth 8-bit (Grayscale), 24-bit (RGB)
Developed by ZSoft (Format) / Pixologic (MIME Registration)
Released 1985
Magic Bytes
0A 05 01 08
Full ZBrush-PCX reference →

Browser Support Comparison

Browser Fuji-RAF ZBrush-PCX
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
Fuji-RAF

Fuji-RAF Strengths

  • Retains absolute maximum sensor data, enabling massive shadow recovery and highlight protection compared to compressed in-camera JPEGs
  • Stores proprietary Fujifilm Film Simulation metadata (like Classic Chrome or Acros), allowing editors to perfectly replicate in-camera aesthetics
  • Very distinct and reliable magic header makes programmatic file detection foolproof
Limitations
  • Proprietary format requires continuous updates to third-party software (like Lightroom) whenever Fujifilm releases a new camera
  • The X-Trans sensor matrix requires highly specialized demosaicing algorithms that are extremely computationally expensive, leading to slower import and rendering times
  • Completely unsupported in standard web browsers and basic operating system image viewers
ZBrush-PCX

ZBrush-PCX Strengths

  • Extremely simple, lossless RLE compression makes it trivial to parse and encode programmatically
  • Universally supported by almost every 2D image editor created since the 1990s
Limitations
  • Completely obsolete for modern 3D workflows, which require 16-bit or 32-bit floating-point precision (like OpenEXR or TIFF) to avoid stepping artifacts in displacement maps
  • No support for modern metadata (EXIF/XMP) or native alpha channels
  • Zero native support in modern web browsers

When to choose which format

Fuji-RAF
Use Fuji-RAF when…
  • Professional Digital Photography
  • Fujifilm X-Trans Sensor Image Archival
  • High Dynamic Range (HDR) Post-Processing
ZBrush-PCX
Use ZBrush-PCX when…
  • Legacy ZBrush Alpha Brushes
  • 8-bit Grayscale Displacement Maps
  • ZBrush Texture Exports

More comparisons

Fuji-RAF vs ACES → ZBrush-PCX vs ACES → Fuji-RAF vs APNG → ZBrush-PCX vs APNG → Fuji-RAF vs AVCI → ZBrush-PCX vs AVCI → Fuji-RAF vs AVCS → ZBrush-PCX vs AVCS → Fuji-RAF vs AVIF → ZBrush-PCX vs AVIF → All comparisons →
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