While creating surface model, I used boundary surface tool for blending edges, but not getting proper curvature tangency in surfaces. Attached is the image and part file. Thanks in advance, if anyone could provide some guide.
Your problem is the VarFillet1. This produces a surface that is tangent to ajacent surfaces but not curvature continuous. A single boundary surface will be curvature continuous all over. This conflict makes your transitions strange.
I haven't tested all but you have at least these possibilities:
Make VarFillet1 Curvature Continuous.
Create 3D help splines from vertex to vertex.
and use these as extra direction two curves.
Untick merge tangent surfaces in Boundary-Surface3.
Make several smaller boundary surfaces between the two major surfaces.
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