Magical gene / spots and rings

Rosette

Leopard rosettes following the curve of the body - a dark ring around a centre that keeps the coat colour - sparse in one copy and blanketing the horse in two.

What it can come out as

Outcome	Carrying
Blanket rosette	`Rs/Rs`
Semi-rosette	`Rs/n`
Wild type	`n/n`

How each one is actually drawn - region by region, and the layers it is built from - is on the coding tab.

Crossing two of them

Finding one

About 1 in 1,250 wild horses is born showing this. That is the whole of the supply: catch one, or make one with the carrot below. Breeds set their own pools and a breed built around this gene will carry it far more often than the wild population does.

Wild pair	Shows as	How often
`Rs/Rs`	Blanket rosette	0.004% — 1 in 25,000
`Rs/n`	Semi-rosette	0.076% — 1 in 1,316
`n/n`	Wild type	99.92%

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/rosette.json — a data-driven gene, not a Java class. It is listed in the index.json beside it and registered by Genes' class initialiser at startup.

Key	`horsegenetics.rosette`
Phase	magical — it adds signed colour in phase 3, after the pigment has resolved
Priority	304 — where it sits in the one `(priority, key)` paint order
Alleles	`Rs` · `n`
Varies per horse	4 values drawn once off the expressing allele copy, so a foal that inherits the copy inherits the look
Built from	AXIS, RINGS, SPOTS, STROKES, TOWARD

What it paints

Each outcome, described the way the gene file describes it, and then the layers that draw it in the order they are painted. The prose is the part a reader checks a bake against; the list underneath is what the engine actually did.

Blanket rosette

Two copies crowd the rosettes together until they touch, and where they touch they read as broken striping rather than as rings. Coverage runs from average to the whole horse, and the mane picks up the tone wherever a rosette meets the topline.

the rings themselves, drawn along the body's curve — RINGS, painted with TOWARD
a soft shadow inside each ring — SPOTS, painted with TOWARD
the mane where the rosettes reach the topline — STROKES, painted with TOWARD

Semi-rosette

One copy scatters the rosettes over the upper half of the horse - clear and well-drawn, but selectively placed, and rarely reaching below the barrel.

rings over the upper body — RINGS × AXIS, painted with TOWARD
a soft shadow inside each ring — SPOTS × AXIS, painted with TOWARD

Wild type

No rosettes.

Paints nothing.