Making the outside surface for this model was pretty easy, I’m however having a hard time getting the inside surface to be smooth! All tips are helpful, I have got it to point where the surface is acceptable but it’s not great.
It is difficult to make suggestions without a .3dm file with the geometry and input used to create the geometry such as curves. You can upload a file by dragging it to where you type a post, or by clicking on the vertical arrow icon above where you type a post.
Also helpful is a description of how the model was created Based on the tags I assume NetworkSrf was used. That command can be very useful and is a favourite of new users, but it has some downsides. NetworkSrf frequently results in surfaces with many control points. Good models usually have close to the minimum number of control points needed to create the desired shape while conforming to any criteria. Fewer control points generally results in smoother surfaces and makes editing the surfaces much easier.
Hello - it helps to think about how to break down the shape into simple surfaces - the base surface appears to be flat - if so, make it a plane. The red areas in the image can probably be simple surfaces, and the blues dashed lines also fairly simple transition surfaces between these larger ones…
Hello - NetworkSrf would probably not be my first choice here. If you want ‘as smooth as possible’ it pays to spend some energy figuring out a good layout for primary and transition surfaces; NetworkSrf may or may not be a fine choice but generally does not make the cleanest surfaces possible in Rhino - but it can be a much faster way out sometimes … it will depend on just what ‘smooth as possible’ means, the time available, etc.
-Post your file, someone will probably be able to get you pointed in the right direction.