'Writing and Reading 3ds Max (2019) Scene “Sidecar” Data in Python' tutorial by Drew Avis
polycounter lvl 12
https://area.autodesk.com/tutorials/writing-and-reading-3ds-max-scene-sidecar-data-in-python/?fbclid=IwAR0LdFBKdCkdy-CnznK8_W2nvmVNztlcJVVmXYLHHW83gRXsy5AIZbbNIjw
"In 3ds Max 2019 custom file streams were exposed in the C++ API and MAXScript. This feature was a direct response to customer feedback (see https://forums.autodesk.com/t5/3ds-max-ideas/maxscript-python-access-to-a-max-file-be-able-to-read-object/idi-p/6787124). This functionality allows you to store arbitrary string data in the 3ds Max scene file itself, which is very handy for adding metadata you might want for handling scene files in your pipeline. The great thing about this feature is that it uses the standard Microsoft Structured Storage format, so you can read and write to these streams outside of 3ds Max"
"In 3ds Max 2019 custom file streams were exposed in the C++ API and MAXScript. This feature was a direct response to customer feedback (see https://forums.autodesk.com/t5/3ds-max-ideas/maxscript-python-access-to-a-max-file-be-able-to-read-object/idi-p/6787124). This functionality allows you to store arbitrary string data in the 3ds Max scene file itself, which is very handy for adding metadata you might want for handling scene files in your pipeline. The great thing about this feature is that it uses the standard Microsoft Structured Storage format, so you can read and write to these streams outside of 3ds Max"