Hi,
Extrude along a path eg simple shapes - such as circles, squares, triangles (any profile ideally).
Yes, I would find this feature very useful also. Would be a much loved feature in FME.
AFAIK - currently not possible in FME
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I think that the nearest we have currently in FME is:
Extruder Transformer - but only extrudes in 1 direction eg vertically - such as 2d building footprints to simple 3d solids OR
Bufferer Transformer - in 3d (solid) mode - will create tubes (ie solids of circular cross section) along polylines eg pipes
Hub3dBufferer is similar I believe
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Have you got AutoCad or SketchUp ???
Then its very simple with these programs.
Until then, consider upvoting this idea (and keep your fingers crossed) .......
https://community.safe.com/s/idea/0874Q000000TlD4QAK/detail
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Hope this helps
Howard L'