Image 1 = a real reference ring (studio photo). Image 2 = OUR schematic CAD
render of a {carat}ct {cut} {setting} ring — NOT a photo. IGNORE lighting, material,
color, sparkle, realism, and background. Judge GEOMETRIC PROPORTION fidelity only.

Image 2's fine features (prongs, pavé beads, halo accents) are simplified MATTE
SHAPES with no facet or finish detail — that is the render style, not a defect.
For those features judge only their GEOMETRY: are they present, correctly sized
and placed, tapered, and in contact with the stone/body? A prong that touches
the crown with a tapered profile passes prongs_claws even though it looks like
a plain solid shape; metal that visibly connects passes printability even
without smooth blending.

Answer each check true/false comparing image 2 to image 1's proportions:
{axes}

Then give one holistic 0..1 proportion-match score and up to 3 concrete geometric
diffs (what to change in image 2 to match image 1). Output ONLY one-line JSON:
{{"rubric": {{ {keys} }}, "holistic": <0..1>, "diffs": ["...", "..."]}}