Original Poster is using Sheet Metal feature to get 2D pattern I assume. If you show a visual example how you used 3d model to get a 2d textile pattern? Are you talking about repeating pattern, that be more of 2D creative interpretation of 3d model it can’t be folded back to create a 3d model.
If textile meaning clothing there are specific software for that as well.
With Cloth simulations
CLO