Extended Polynomial Surface
This object is very similar to the Extended Polynomial Lens object. Rather than being a solid, the object is a shell surface with only 1 set of extended asphere coefficients. The object is defined by these parameters:
| Parameter # | Description | Face Name | Face # |
| 1 | The radial height of the surface. This object supports user defined aperture shapes, see "User defined apertures" . | All Faces | 0 |
| 2 | The radius of curvature. | All Faces | 0 |
| 3 | The conic constant k. | All Faces | 0 |
| 4-5 | Unused. | NA | NA |
| 6 | The normalization radius. | All Faces | 0 |
| 7 | The number of extended polynomial terms (up to 242 terms) | All Faces | 0 |
| 8-249 | The extended polynomial coefficients. | All Faces | 0 |
The reference coordinate is the center of the surface. Face Numbers: All faces Face 0.
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