Fujifilm RAFs carry per-shot GeometricDistortionParams (0xf00b) and VignettingParams (0xf010)
in the raw IFD. Derived by measurement against the cameras' own JPEGs and LightCraft's
uncorrected renders: [scale, n knots, n values], scale x n = half diagonal of the recorded image,
last knot = farthest corner, distortion in percent indexed by the source radius with the
frame-filling zoom, vignetting as 100/V gain. They become a WarpRectilinear and a
FixVignetteRadial for 59 validated bodies (same path as the Sony ARW and Panasonic RW2
corrections); unmatched bodies and tables with another scale stay uncorrected.
On 67 body/lens combinations the corrected render's radial shape error against the camera JPEG
falls from a median of 0.72 % to 0.05 % of the half diagonal. The lateral CA table (0xf00f) is
real but is not applied: our demosaic already registers the colour planes and the stored shift
over-corrects. See docs/fuji-lens-corrections.md.
RENDER_CACHE_VERSION 48.
