This is illustrated in the screen snapshot shown at the right - a SAT model consists of one or more bodies, each of which is comprised of one or more lumps, shells and faces. By recreating this hierarhical relationship a material can be quickly assigned to any or all parts of the ACIS model. Flip Model so that Y Axis is 'Up' If this option is enabled then the model will be rotated so that its 'Up' axis is aligned with the positive Y axis instead of the positive Z axis. If this checkbox is enabled then the import converter will print out the number of objects, polygons, normals, texture coordinates, tangent vectors and surfaces that were parsed from the SAT file. If this checkbox is enabled then the import converter will compute proper vertex normals for each triangle vertex.
Vertex normals are necessary to make an object appear to be smooth when rendered.
Texture coordinates are necessary if a bitmap texture image is to be applied to the object at some time in the future. If this checkbox is enabled then the import converter will compute proper tangent vectors for each triangle vertex. Tangent vectors are necessary if bump map texture image is to be applied to the object at some time in the future. If this checkbox is enabled then the import converter will remove any duplicated or redundant vertex coordinates. This will not modify the object but it may reduce the amount of memory required to store the imported model.