Magical gene / colour modifiers

Nebula Light

Overlapping zones of pink, violet and blue across the back half of the horse, fading onto the tops of the legs, with a fine population of points through them and a few larger ones wearing halos.

What it can come out as

Outcome	Carrying
Nebula Light	`Neb/Neb` · `Neb/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 10,000 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
`Neb/Neb`	Nebula Light	0.0005% — 1 in 200,000
`Neb/n`	Nebula Light	0.0095% — 1 in 10,526
`n/n`	Wild type	99.99%

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/nebula_light.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.nebula_light`
Phase	magical — it adds signed colour in phase 3, after the pigment has resolved
Priority	433 — where it sits in the one `(priority, key)` paint order
Alleles	`Neb` · `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	AXIS, NOISE, PALETTE, SPECKLE, SPOTS, TOWARD, emissive

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.

Nebula Light

A quarter to a half of the horse, centred on the back of the barrel, the flank, the croup and the hip, and reaching forward onto the shoulder about half the time. Two to four hue zones overlap within it, drawn from a pink-through-violet-through-blue family so that no two of them clash, each a foot or two across and blended into its neighbours over a long transition. There is no hard boundary at any margin, and where the field meets the top of a leg it carries a little way onto it and fades out rather than stopping at the elbow - it does not run down the limb. Through the field runs a population of fine points, with a few larger ones wearing halos.

the hue zones — NOISE × AXIS, painted with PALETTE
a little of the field bleeding onto the tops of the legs — NOISE × AXIS × AXIS, painted with PALETTE
the fine point population — SPECKLE × AXIS, painted with TOWARD, and it glows
the larger points, with halos — SPOTS × AXIS, painted with TOWARD

Wild type

No nebula.

Paints nothing.