Filling Perimeters

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Perimeter filling requires that the perimeters be planar and lie in the 'XY', 'XZ' or 'YZ' plane. If the perimeters do not meet any of these conditions, you Will need to use wireframe modeling.  

The process creates cells within the perimeter, perpendicular to the perimeters at a user defined projection distance either side of the perimeter.  Typically this projection distance is set to half the section spacing and care needs to be taken to ensure that the values you use do not create gaps or overlapping cells between the sections.  

The results will also be better if you closely space your sections and the geological structure lies

approximately along an orthogonal axis. Otherwise the model created may appear 'blocky' and a poor fit to the actual geology.