Fabrics with segment filling insertion are finding application in several traditional luxurious textiles, clothing, and in the latest time as well for smart textiles. Segment filling allows the integration of conductive yarns for contacting areas, keeping the textile character of the structures. This work presents a method for 3D modeling woven structures with segment filling at the yarn level. The pattern image is analyzed by an image processing tool, written in Python, and used to create the initial weaving information. After that, the different regions are filled with suitable preselected weave types, such as plain, twill, or others. Finally, this data is used to compute the 3D coordinates of the weft and warp yarns, and saved in a suitable format. The 3D visualization is done by the TexMind Viewer, which allows its advanced version export in various formats for FEM, CFD, and other computations.