The biggest problem during the folding process is the creation of very small surfaces which can only be meshed with very small elements. This is problematic for the time step, and bad quality elements negatively impact the quality of the computations. Following are some hints to avoid problems:
| • | Define the initial geometry with the longest segments possible. Their length should only be limited by the shape of the airbag. |
| • | If the initial shape of the airbag is complicated (for example, a flattened passenger airbag), it may be useful to mesh it and check for surface intersections. If there are intersections, they should be removed at this stage. |
| • | Use the gap value coherent with the initial gap between different layers of the airbag. If the airbag becomes too thick to be folded, restart the folding process with thinner initial geometry. |
| • | When defining the intersection lines, pay attention to the nodes such that their projection on the airbag plane is close to the fold line's projection. It may be better to define a fold line by picking existing nodes, rather than by entering coordinates manually. |
| • | The safest (but also the slowest) method is to mesh the airbag after each fold and check for minimum element size. |
value of about 
(see Surface Distortion and Diminishing Area for more details).