The volume polarization currents in 2.5-D MoM have a vertical direction along the Z-axis. These are discretized using prismatic basis functions that have either a rectangular or triangular base with a constant profile along the Z-axis.
[[File:image065_tn.png]][[File:image066_tn.png]]
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<td> [[File:image065_tn.png|thumb|480px|Prismatic basis functions built over single function with triangular and cross section.]] </td> <td> [[File:image066_tn.png|thumb|480px|Prismatic basis functions with rectangular cellscross section.]] </td>
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Prismatic basis functions built over single triangular and rectangular cells.
== The Rectangular Mesh Advantage ==