Where patterns live on a crested gecko

The words breeders use

Words first. The crests are the pins that form the diamond on the head. The pins are the rows of raised, spiky scales that run down the animal's back from the head to the tail.

Look at a crested gecko from the side. Above the pins is the dorsal (the dorsal area). Below the pins, down to the belly, is the side (the laterals). Breeders read the side in three sections:

Flame and Harlequin

Flame and Harlequin climb. Their pattern rises up the side in vertical zig-zags, like flames licking upward. Breeders sort them by coverage, how far the pattern climbs and how much of the side and legs it covers:

• A Flame has side pattern below the quadstripe line.
• A Harlequin starts below that line and extends above it. It usually doesn't join the dorsal: just below the pins there are breaks where the base colour shows through.
• An Extreme Harlequin is the name for the heaviest coverage: pattern over most of the side and legs, reaching the pins in places.
• Flame and Harlequin are two names for one side pattern at different coverage. An animal receives one of these labels, never both.

In Gecktopia, Harlequin coverage is inherited through an HQ factor. One copy draws ordinary Harlequin coverage and two copies draw Extreme Harlequin. That is the game's approximation, so a copy count in the game is not a way to read a real gecko's genotype.

Empty Back

Empty Back erases ordinary dorsal pattern pigment to reveal the animal's actual base colour. It does not paint a dark or black overlay, so a yellow or red base stays yellow or red inside the cleared area. A visual Empty Back may keep some pattern near the head, fading to a clear back toward the tail. A Super Empty Back generally clears the dorsum except for a possible small head remnant. The boundary varies by animal. Pinstripe borders and a Quadstripe are separate features and remain visible, which can make the empty back look especially clean. See [AC Reptiles' Empty Back account](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=53) and Dusty's 2026-10-04 reference photos.

Quadstripe

Quadstripe is a horizontal line along the middle of the side, running along the body between the legs, below the pinstripe.

Tiger and brindle

When a gecko is described as Tiger, the tigering shows: bands of darker base colour running down from the base of the pins. Their reach varies by animal and by band: some stop on the upper side, while others cross the lower side to the belly. The bands are usually thin, with occasional broad ones; their contour and lean also vary. Flame or Harlequin pattern sits in the gaps between them. Brindle is broken tiger: finer bands, broken into pieces.

In the game, Gecktopia draws every gecko with a common banding system, and it is what gives Flame and Harlequin their vertical bands. How strongly the bands show varies, and an animal called Tiger is one where they show clearly. That is how the game draws banding, not a claim that a Tiger gene is present in every real crested gecko.

Phantom on Pinstripe

Phantom leaves the raised pin rows in place but changes their colour. Some animals retain no white pins; others have a few fragments or longer stretches, often stronger toward the tail base than the head. Each gecko's amount is fixed by its seed. Gecktopia changes the pin-row colour along that route instead of depending on the broad Phantom overlay to hide it. Phantom's base tint also eases through the neck and head; it does not make the whole face a separate pale patch. See [Lil Monsters' Finding Phantom](https://lmreptiles.com/fg-findingphantom/) and its [Phantom Pinstripe examples](https://lmreptiles.com/fg-pt2-1/).

Phantom on Flame and Harlequin

Phantom suppresses Flame and Harlequin pattern on the laterals and legs. Their genes remain carried, but neither side-pattern label appears in the displayed name. The dorsal retains its diluted colour and pattern. Tiger and Brindle bands remain visible on the flank, and Quadstripe remains a separate line. This follows Dusty's 2026-10-04 reference set, including an animal labeled Phantom Harlequin Pinstripe whose flank is otherwise clean.

Visible Tiger and Brindle bands keep those words in the displayed name; hidden Flame and Harlequin stay carried. Brindle's broken bands take precedence over Tiger when both would describe the same visible marks. The game keeps Quadstripe's line and name as a separate trait. Marbling marks also remain visible. Snowflake flecks remain visible when White Pattern is carried, even though Phantom hides the broad White Pattern and omits that label from the name.

Tangerine on Phantom

Tangerine pigment can warm exposed base skin as well as remaining pattern and pin markings. It reads strongest on a light yellow base and is much less visible on dark or red bases. Phantom still suppresses Flame and Harlequin side pattern, so a warm, clean flank does not require a body-wide pattern layer. Tangerine's exact inheritance is disputed: Gecktopia's one/two-dose calculation is a provisional game model, not a settled breeding claim. See the [evidence review](../research/crested-genetics-2026-09-24/README.md) and the breeders' accounts from [AC Reptiles](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=52) and [Gecko Nerd](https://www.geckonerd.com/post/let-s-talk-tangerine-phantom).

Phantom on Orange Pattern

Phantom usually removes orange dorsal markings. A minority of geckos keep small, faint remnants; these read as transparent brown rather than vivid orange. This is a separate interaction from Phantom's subtle base tint and its White Pattern rule. Orange Pattern remains carried but is omitted from the displayed name on a Phantom. See [AC Reptiles' Phantom account](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=54).

Phantom on White Pattern

Phantom usually removes ordinary cream or white dorsal markings too. Rare animals keep a diluted cream wash in the same dorsal pattern, which varies by gecko. White Pattern remains carried rather than appearing in the displayed name. This ordinary pattern rule does not alter Pinstripe's raised scales, Lilly White, or Whitewall; each has its own layer and interaction. See [AC Reptiles' Phantom account](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=54).

Phantom on Whitewall

Whitewall's lower lateral white remains nearly unchanged on a Phantom. The Phantom base tint recedes inside the white block and eases back in along its scalloped edge; exposed skin keeps its ordinary Phantom tint. This preserves Whitewall's own coverage instead of replacing it with a generic Phantom overlay. See [AC Reptiles' Phantom account](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=54).

Bicolor on a Patternless Phantom

Patternless removes ordinary markings, but a visual Phantom still makes the dorsum a slightly different colour from the plain body. The Phantom veil is confined to the dorsal in this combination and fades at the pin line. Gecktopia can call this look Bicolor while keeping Patternless in the displayed name. Bicolor is a visual description, not proof of a unique genotype or a universal Phantom requirement; see the [evidence review](../research/crested-genetics-2026-09-24/TRAIT-REVIEW.md#bicolor).

Phantom on Dalmatian spotting

Phantom's light tint also sits over Dalmatian spots, softening their black and red pigment while leaving their shapes and placement intact. This is the look Dusty chose from the 2026-10-04 comparisons. Bullseye centres render inside their dark rings and receive the same tint. Pinstripe stays above spots, while Lilly White and Whitewall cover spots where their white is opaque. Dalmatian remains in the displayed name. [AC Reptiles documents red Phantom Super Dalmatians](https://acreptiles.com/new_store/index.php?dispatch=pages.view&page_id=65).

The two whites: Lilly White and Whitewall

They are different traits and worth keeping apart.

Lilly White spreads inward from the animal's outline. The lower lateral is white; above the quadstripe line, its reach varies from gecko to gecko. The dorsal is usually white too. When base pattern survives there, it starts midway between the two pin rows and widens toward both rows equally, like a Superstripe. White advances unevenly from the front-facing edge of the near foreleg and the tail-facing edge of the near hind leg. The feet and far legs have no Lilly White outline. The head and tail follow an inward spread. It is recognisable by its "highlighter yellow" accent along the belly line, and on the fringe of a hind leg. The rear kneecaps and front elbow stay white even at low expression. At least a quarter of the loose rear-leg fringe stays white even at low expression. White connects the rear kneecap to the torso across the upper hind-leg seam, and a short white fringe runs down the back edge of the front elbow. Where the head, torso and legs meet, the white keeps a sharp irregular edge while its shape flows across the join.

Whitewall is the other one: a solid block of white up the lower side, climbing from the belly with a scalloped top edge, between the front and hind legs. It leaves the rest of the gecko alone and carries no accent.

Both are creamier than White Pattern, which follows the flame or harlequin shapes rather than covering them. In Gecktopia's drawings, Lilly White and Whitewall are laid over the other pattern. That order is a drawing convention, chosen to match how these animals look, not a finding about how the traits work. Harlequin pattern remains visible in any exposed base-colour window beneath Lilly White.

Legs and the dorsal

Legs carry pattern too: plenty on a Harlequin, a small amount on a Flame.

The dorsal varies from nearly solid to broken into blocks by bars of base colour showing through.

Every gecko in this chapter was drawn from its own genes while you read it, by the renderer that draws them in the game. Names in the text open their entry in the library.