yes the concept is thisso it must be bombed but with the shape of the red sketch?
Some images would help you understand what doesn't come back because the short command is used with basic options then cutting tool (red disk) and surface choice to maintainonly that if I make surfaces>accorcia the surface that is generated does not match with the red sketch
clarify the concept: how does a surface be curved and have a flat base? a surface has no thickness and therefore cannot:I'd need the base of the surface to be flat so it fits with the red sketch
with the red sketch make a size of all the excessI'd need the base of the surface to be flat so it fits with the red sketch