Hi Slobodan - the sweep doesn't work too well there because of the steep vertical area where the sweep rails came together to a point.

Imagine your base profile moving along in slices as it moves towards that end point - as it gets close to the ends there is a lot of variation in the slices since the area becomes so steep there.


Probably the easiest way to do the basin here would be to extrude your outline downward and then fillet the bottom face using a blend-shape fillet. That would be fairly close to your outline, especially along the back side of the sink. But I guess it doesn't quite match the front side because you want more of a gentle curve downward there instead of it going straight down...


One way to make some progress is to cut things up a bit and do some sweeps in the easier areas to start with, I've attached a version with that started. Sometimes if you can shrink the difficult area down to a smaller region it can be easier to deal with it.

I'll see if I can come up with some other ideas...

- Michael