tfRiverExport
tfRiverExport simply exports the points of the rivers as a segmented spline.
Optionally, it also creates geometry for the river/water surface.

Default User Interface (UI), on opening up tfRiverExport.
tfRiver Operator
Section titled “tfRiver Operator”Unfold the drop-down arrow to reveal the UI for the tfRiver operator, which you are currently using.
Any changes you make from inside tfRiverExport will be reflected in the tfRiver operator itself.
There are two settings: Spline and Geometry.

Spline mode.

Geometry mode.
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