Fetching Autodesk rendering material

[amitA6Y4P]

I am trying to export geometry using the built-in FBX export and show it in my app.
Exporting FBX model shows the "shaded " model. While inside Navisworks "Full Render" it is applying "Autodesk material". How can I fetch these material to use and apply in my application. 

When trying to fetch using "item.PropertyCategories" only for few elements it shows "Autodesk Material" as one of the category of property. 

[naveen.kumar.t]

Hi @amitA6Y4P ,

I just want to confirm my understanding of your issue.

Are you saying that you’re able to extract material data from the "Autodesk Material" tab in the Properties panel, but for some items, the "Autodesk Material" tab does not appear?

Is that correct?

Could you please clarify the issue further—preferably with a screenshot—and also share a simple sample file so I can test it on my end?

Additionally, if you're able to retrieve the material data from the "Autodesk Material" tab for all elements, would that help resolve the issue?