You can convert boundary surface and trim surface features into solid features using a Create Solid option, provided the surface features can create a closed volume from the inputs.
The Create Solid option was formerly called the Try to form solid option. In previous releases, you had to knit the surface manually before you could convert the surface into a solid.
To convert a boundary surface into a solid, click , and in Options and Preview, click Create solid.
To convert a trim-surface feature into a solid, click and in Surface Split Options, click Create solid.