EXR is an HDR graphics file saved in OpenEXR Image format. EXR file contains high-dynamic range raster images. HDR imaging technique allows to create images of very high-quality. EXR images can be uncompressed or compressed using one of three supported compression algorithms (PIZ, ZIP, RLE).
After converting the file to the new format, you will be able to use other programs to support it. Keep in mind, however, that the XAF file after converting to EXR may differ slightly from the original. The most important information should be kept, but if you want the file after conversion from XAF to EXR to be the same, you have to do this carefully and choose the proper application from the list below.
There is no guarantee, of course, that the conversion will come up to all your expectations, but it will certainly help you. If, after all, the effect of converting XAF to EXR does not meet your expectations, you can simply try to find on the Internet a different version of your file in XAF format, properly converted to a EXR file by someone else. If this fails, use the information provided in the further part of the website.
Unfortunately, if after performing the two previously described steps (trying to find your XAF file converted by someone else, and the attempt to convert it to EXR on your own) you still have a problem with your file, then there are only a few solutions left. You can once again try to find and install an application that can open the XAF file in its original format (without conversion to EXR file). Such a solution will be difficult to implement, but it certainly will give the best result.