what is ribbon surface....? waht at is use of ribbon surface....
give some examples n also give some brif idea abt it with images....
I could not upload the files directly here, but you can see an example if you search for: Example of Ribbon Surface (answer).
open help in pro e
type "ribbon"in search
then click "About a Ribbon Surface "in search result
now you can see below in the reference link given
click Example: Using a Ribbon Surface