<span style=”color: #000000; font-family: Montserrat; font-size: 15px;”>There are software programs that assist designers to visualize complicated 3D shapes of products made with fabrics. Many industries, not only clothing designers, use them for their simplicity, accuracy and speed. When the designer modifies the 2D pattern pieces, the 3D model changes as well, in real time. CLO3D is the most popular, available online to amateurs as well as professionals. Hope this helps.</span>
Edit: I made an error recommending another software program that is not applicable for the OP’s use. Deleted.