I'm trying to create geo from some curves but i constantly run into this issue where either polyExpand2d or polyExtrude flip normals. Is there a good way to fix this issue (so normals are always up)? This gif is a super simple example... I want to work on like 50 curves

point normals after extrusion point in the correct direction based on the polygon winding
and forcing them to point in opposite direction without fixing the polygon winding would cause all sorts of issues down the line

so safest is to flip polygons after the fact
- Group Create SOP: use Keep By Normals to group only polygons facing downwards
- Reverse SOP: to reverse that group's polys therefore to fix their geometric normal
- optionally Normal SOP if you already had Point or Vertex normals on the geo that also need to be flipped use the same group to reverse or recompute them