2008

using the standard set of OpenEXR libraries, most software only reads the

16-bit “half” floating point RGBA files that are considered standard EXR files.

Configuration File Usage

Most bitmap I/O plug-ins, including those integrated into 3ds Max, store their

configuration information in a binary CFG file that cannot be edited. To allow

external scripting support as well as ordinary preferences, the OpenEXR

software uses a standard INI file format to store its configuration data. The

file is named openexr.ini and is found in the plugcfg folder in the program

directory. The file is generated automatically the first time you edit the

OpenEXR configuration settings, and is updated each time you modify an

EXR loader. It is a standard text file and can be modified with any text editor.

When the INI file is written, it automatically generates a companion “help”

text file named openexr_ini_help.txt. This file contains the valid ranges for

various INI settings, as well as the various text strings used to specify

compression type and bit depth. This file is just a guide; editing it has no

effect, and it is overwritten whenever the INI file is updated.

To restore the default settings after editing the INI file, simply delete the

openexr.ini file and a new one with the original defaults will be generated the

next time you edit the configuration settings.