Smooth transition of surface problem - Rhino for Windows - McNeel Forum

I’ve been trying to boost my surfacing skills but got stuck. I cannot seem to get a nice transition between two surfaces and I’m starting to wonder if it is geometrically impossible so I figured I’d ask the surface experts here. So I get this problem when trying to blend the surface on the right to the surface on the left using sweep2. This is what I’m trying to achieve when it comes to surface requirements. The bottom curve of the surface to be created needs to stay like that, the top one

Smooth transition of surface problem - Rhino for Windows - McNeel Forum

Smooth transition of surface problem - Rhino for Windows - McNeel Forum

Smooth transition of surface problem - Rhino for Windows - McNeel Forum

Smooth transition of surface problem - Rhino for Windows - McNeel Forum

Smooth transition of surface problem - Rhino for Windows - McNeel Forum