Schematic summary of the xs-ringauss and mF-ring model parameters. The xs-ringauss is defined to be a disk with a circular hole removed, that is allowed to be offset from the center of the disk and rotated. A circular Guassian is pinned to the center of the disk as an emission floor, and an additional elliptical Gaussian is pinned to the inner edge of the offset hole. The mF-ring is an m-ring of order 2 that has an elliptical stretch which is allowed to be rotated. A flat emission floor is included to match the interior of the m-ring. Both models have an additional blur defined on them with a Gaussian blurring kernel. The intensity profiles of the fiducial models along two axes are indicated in red and green. An angular intensity profile is also shown for the mF-ring in blue.