Using B44 compression and Luminance/Chroma sampling, HDR images can be crushed to a fraction of their uncompressed size, usually without visible artifacts, only in ProEXR. Most EXR compression is lossless, but one of the most interesting options is a lossy method similar to JPEG, applied to the world of floating point. ProEXR lets you choose from all the compression options available in OpenEXR. ProEXR will also read all the image buffers created by modern 3D renderers and place each in its own Photoshop layer.
Or in one step save layers as individual files for programs that are less EXR savvy.
Store all your layers in one file and read them into After Effects, Nuke, Shake, and Fusion. OpenEXR can support multiple layers of imagery, but Photoshop can't read or save layered EXR files.unless you have ProEXR. Access all the capabilities of OpenEXR from within Adobe Photoshop, After Effects, and Premiere Pro using ProEXR. OpenEXR is the visual effects industry-standard floating point file format and the best format to use when working with 32-bit HDR imagery.
