Smooth surfaces

• EP Curve Tool

Select all

• Surfaces > Loft

• Right click > Control Vertex

• Modify > Convert >NURBS to Polygons > Convert NURBS to Polygons Options > Type: Quads

• EP Curve > Draw two curves

• EP Curve > Hold down "c" + click on the line

• EP Curve > Hold down "c" + Click on the other line

• Select the line.
• Curves > Rebuild.

• Number of Spans

• Right click > Control vertex

• Adjust the curve with Soft Selection enabled

• Select all > Surfaces > Birail