The invention relates to a first computer implemented method for automatically generating a first 3D garment model representing a first garment to be fabricated from first garment panels, a second computer implemented method for virtually finishing a second 3D garment model representing a second garment to be fabricated without finishes or with default finishes, and a third computer implemented method for automatically generating a plurality of third 3D garment models in a batch process, each third 3D garment model representing a third garment to be fabricated from third garment panels.