Visualisations of the compound shapelets mean G₀ (Col. 1) andfirst three basis components G₁–G₃ (Cols. 2–4) for FOV1 (top row) and FOV2 (bottom row). Within each FOV the same components are used to model all CCDs. These demonstrate the large differences in the mean PSF between the two FOVs, but also the similarity in the low order basis components due to the PSFs for the two FOVs being subject to the same major dependences.