Magical gene / colour modifiers

Fielded

Grass-like tendrils drawn out of the edges of the horse's white markings - and nothing at all on a horse that has none. A third allele carries the same marking worked in greys instead of white - dark where the pale form is light, and the same number of steps.

What it can come out as

Outcome	Carrying
Fielded	`Fld/Fld` · `Fld/Flw` · `Fld/n` · `Fld/Flk`
Black Fielded	`Flk/Flk` · `Flk/Flw` · `Flk/n`
Coloured Fielded	`Flw/Flw`
Wild type	`Flw/n` · `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 595 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
`Fld/Fld`	Fielded	0.006% — 1 in 16,667
`Fld/Flk`	Fielded	0.008% — 1 in 12,500
`Fld/Flw`	Fielded	0.008% — 1 in 12,500
`Fld/n`	Fielded	0.114% — 1 in 877
`Flk/Flk`	Black Fielded	0.008% — 1 in 12,500
`Flk/Flw`	Black Fielded	0.008% — 1 in 12,500
`Flk/n`	Black Fielded	0.008% — 1 in 12,500
`Flw/Flw`	Coloured Fielded	0.008% — 1 in 12,500
`n/n`	Wild type	99.832%

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/fielded.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.fielded`
Phase	magical — it adds signed colour in phase 3, after the pigment has resolved
Priority	600 — where it sits in the one `(priority, key)` paint order
Alleles	`Fld` · `Flk` · `Flw` · `n`
Varies per horse	3 values drawn once off the expressing allele copy, so a foal that inherits the copy inherits the look
Built from	LUMA, NOISE, STROKES, TOWARD

Why it is built this way

The black allele is the white one with the light taken out of it, and it sits one rung under white in the dominance series - so every combination that existed before it keeps the outcome it had, and only the pairs carrying Flk are new. The re-toning is a mapping rather than a repaint: every achromatic target moves into the dark end of the scale keeping its order and its spacing, and every SATURATED one is left alone, because that colour is the gene rather than its lightness.

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.

Fielded

Thin wispy streaks with an organic, wind-blown quality - never zebra bars, never tiger stripes. They run out of the edges of whatever white the horse already has: a tobiano patch, a splash, a blaze, a stocking, a snip. On a horse with no white anywhere there is nothing to run out of and Fielded shows nothing at all, however many copies it carries. At the quiet end there may be a couple of lines off a facial marking; at the loud end they cover the horse, interweaving across the ribs and hindquarter, and where one crosses the topline it carries on into the mane or tail. It can put blue in an eye without going anywhere near it. One copy looks exactly like two.

wispy streaks running out of the white — STROKES × NOISE × LUMA, painted with TOWARD
the streaks carrying on into the mane and tail — STROKES × NOISE × LUMA, painted with TOWARD

Black Fielded

The same marking as the white form with the light taken out of it: a single near-black tone.

wispy streaks running out of the white — STROKES × NOISE × LUMA, painted with TOWARD
the streaks carrying on into the mane and tail — STROKES × NOISE × LUMA, painted with TOWARD

Coloured Fielded

The same tendrils in a colour the line carries rather than in white, and the same rule: they only grow out of white the horse already has. Fully recessive - it takes two copies, and a single copy beside the white allele shows white. It never gives blue eyes, whatever the white form does.

wispy streaks running out of the white, in colour — STROKES × NOISE × LUMA, painted with TOWARD
the streaks carrying on into the mane and tail, in colour — STROKES × NOISE × LUMA, painted with TOWARD

Wild type

No streaks.

Paints nothing.