Hull, parallel and convolution are three methods used to construct a cut-in or wrap shape.

Hull

It is good for simple shapes, but it will not follow all the details of a figure.

Parallel

It can be suitable where Hull fails. If the parallel method creates strange shapes, apply the simplification.

Convolution

It is the best method, but in some cases it can create strange loops. Then, apply simplification.

Simplification

It "filters" the created shape, making it rougher by removing the imperfections of the created shape. Incrementing the simplification, shape turns into a low-detailed Hull.