Spline modeling?

Can you spline-patch model in Nvil ? ;

1" create curves
You first lay down your curves to define an area.

2" Patch = fill area with polys
When you select the curves, you run a (patch) command that fills that area with polygons automatically.

(It’s like surface modeling - with polygons).

Thank you

The Draw Mesh tool can generate polygons patch defined by 4 drawn lines. Can't do any patch that is define by different number of lines rather than 4.

There is the "Streamline Basic Tool" > Spline Surface.
As it is a streamline basic tool, you will need to add it to a Streamline tool (there is some info/help about that in "Help > Contents > Tutorials > Modeling Examples > "Set up a Streamline Tool"

There is also "SplineVertex Shortcut Tools > Loft" which can be used in a similar way.