render_openexr.py

"""Configures OpenEXR output render format with SetImageSettingsDictionary() then reads these with GetImageSettingsDictionary().

Topics:
    * c4d.bitmaps.SetImageSettingsDictionary()
    * c4d.bitmaps.GetImageSettingsDictionary()
"""
__author__ = "Maxime Adam"
__copyright__ = "Copyright (C) 2026 MAXON Computer GmbH"
__license__ = "Apache-2.0 License"
__version__ = "R20"

import c4d
import maxon


def main():
    # Retrieves render data and its container
    renderData = doc.GetActiveRenderData()
    bc = renderData.GetDataInstance()

    # Gets image filters options
    saveOptions = bc.GetContainerInstance(c4d.RDATA_SAVEOPTIONS)

    # Sets OpenEXR output format
    bc[c4d.RDATA_FORMAT] = c4d.FILTER_EXR

    # Defines OpenEXR settings
    compressionmethodID = maxon.InternedId('net.maxon.mediasession.openexr.export.compressionmethod')
    halffloatID = maxon.InternedId('net.maxon.mediasession.openexr.export.halffloat')
    layernumberingID = maxon.InternedId('net.maxon.mediasession.openexr.export.layernumbering')

    # Configures OpenEXR format options with a maxon.DataDictionary
    exportSettings = maxon.DataDictionary()
    exportSettings.Set(compressionmethodID, maxon.Id("rle"))
    exportSettings.Set(halffloatID, True)
    exportSettings.Set(layernumberingID, True)

    # Stores settings in render data container
    c4d.bitmaps.SetImageSettingsDictionary(exportSettings, saveOptions, c4d.FILTER_EXR)

    # Pushes an update event to Cinema 4D
    c4d.EventAdd()

    # Retrieves OpenEXR images settings
    settings = c4d.bitmaps.GetImageSettingsDictionary(saveOptions, c4d.FILTER_EXR)

    # Reads and prints OpenEXR format options
    print("openexr.export.compressionmethod: " + str(settings.Get(compressionmethodID)))
    print("openexr.export.halffloat: " + str(settings.Get(halffloatID)))
    print("openexr.export.layernumbering: " + str(settings.Get(layernumberingID)))


if __name__ == '__main__':
    main()