Hi everyone,

I am trying to generate a surface starting with the boundaries of the red region to extend up to the outer boundaries shown in white color (as shown on above picture)

* My goal is to perform this without exiting the Zemax software.
* I have some constraints while extending the surface from inner boundaries up to the outer boundaries; the extension surface must be continuous and good to have no change of sign of rate of change (as shown on below picture)
 

 Any comment or suggestion is welcomed.