OpenEXR is the film industry's HDR format — ILM invented it for Star Wars. Your CMS, email client, and design review tool have never heard of it. PNG is the bridge.
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Supports EXR
Supports EXR
Drop OpenEXR files from Blender, Nuke, DaVinci Resolve, Arnold, V-Ray, or any EXR-producing software. Single-part and multi-part EXR supported.
Linear HDR EXR data tone-maps to PNG display range. 8-bit output for compatibility, 16-bit PNG for color-critical needs (Photoshop, color-managed compositing).
PNG output with alpha channel if the EXR had one. Opens in every design tool, browser, and review platform without special codecs.
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High dynamic-range (HDR) file format developed by Industrial Light & Magic
See High Dynamic-Range Images for details on this image format. To specify the output color type, use -define exr:color-type={RGB,RGBA,YC,YCA,Y,YA,R,G,B,A}. Use -sampling-factor to specify the sampling rate for YC(A) (e.g. 2x2 or 4:2:0). Requires the OpenEXR delegate library.
Portable Network Graphics
Requires libpng-1.0.11 or later, libpng-1.2.5 or later recommended. The PNG specification does not support pixels-per-inch units, only pixels-per-centimeter. To avoid reading a particular associated image profile, use -define profile:skip=name (e.g. profile:skip=ICC).
Tone-mapping, 16-bit output, alpha channels, multi-part EXR.
