One thing Autodesk is truly infamous for industry-wide is being the utter worst when it comes to file formats.
They make their file format unreadable by anything other than they products by design.
And even within their own product line, it sometimes doesn't work.
So I'll ask you this: what can you do with your f3d file?
Can you import it into blender to render it with a proper rendering engine?
Can you open it with a text editor and change things in it?
Can you convert your model to a format that's readable by other tools?
Can fusion import models created by other tools?