Thank you @ferdinand for answer. Yes, most of the code is from chat but when I create Xpresso python it shows this command :

It looks like changing OCIO View Transform doesn't work using Python

import c4d
import maxon

def main():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        print("No active document found")
        return

    # Create a new OCIO Config object
    ocio_config = maxon.c4d.documents.OpenColorIOConfig()

    # Load the OCIO configuration file (replace with your actual path)
    ocio_config_path = "$OCIO"
    result = ocio_config.Load(ocio_config_path)
    if result != c4d.OPEN_COLOR_IO_OK:
        print("Error loading OCIO configuration")
        return

    # Set the OCIO view transform
    ocio_view_transform = "3"  # Replace with your desired view transform
    ocio_config.SetViewTransform(ocio_view_transform)

    # Apply the OCIO configuration to the current document
    doc.SetOcioConfig(ocio_config)

    c4d.EventAdd()

# Only execute the main function if the script is run directly
if __name__ == '__main__':
    main()

This simple version doesn't work too :

import c4d

def main():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        print("No active document found")
        return

    # Set the OCIO view transform
    view_transform = "3"  # Replace with your desired view transform
    doc[c4d.DOCUMENT_OCIO_VIEW_TRANSFORM] = view_transform

    c4d.EventAdd()

if __name__ == "__main__":
    main()

Unfortunately this script doesn't include Specular and Displacement channels conversion.

Thank you very much for depth explanation. I didn't know that "polygons have changed" means that they need to be deleted. I thought that it will works with polygons modification too.

But using one of the code I have this error :

Regards,
Sebastian

Hi,

def message (id,data) in Interaction Tag ( scripting tab ) seems to not work :

None of the message id's from here doesn't work : https://developers.maxon.net/docs/py/2023_2/manuals/application_development/manual_message_system.html like c4d.MSG_POLYGONS_CHANGED ( id 2 )