Hi Wolfgang,

re:
> But I need a larger radius than can be created with trim/blend.
> And I would like to determine the type of curve of the radius myself.

You might try using the Network tool in Rhino instead for that area then, in Rhino there are options for Network to make it smooth with the adjacent surfaces.


> Is it possible to create what I need with your second tip? Could you explain this to me?

Just that it's much easier to make areas smooth when they are made up of one surface instead of multiple fragments.

- Michael