White Out Crested Geckos
The White Out morph adds solid white markings to the sides of a crested gecko on top of any existing pattern. A whitewall is the result of two copies giving heavy white sides. Because a single-copy adult can still produce one, you should judge breeding stock by its lineage as well as its looks.
About the White Out gene
A white out adds white to the sides of a crested gecko over its existing pattern. If the animal has one copy, it will show white lateral markings. With two copies, the animal has heavy white sides from limb to limb. The hobby sells this as a whitewall, which means even a plain-looking White Out is valuable breeding stock.
Appearance
White sits on the laterals while the rest of the gecko's shape determines if it is a harlequin, pinstripe, tiger or lateral striping based on its position and amount. From very obvious to so faint that nobody notices it, the expression varies. Because lower-expression White Outs were sold as ordinary geckos for years, whitewalls kept appearing from adults that did not seem to carry anything. The extreme is the two-copy animal. This has solid, unbroken white laterals from limb to limb that reach well up the sides with a clean line against the base colour. The cream edging on the back of the hind legs, known as Fringing, travels closely with it. A heavy White Out can look like a hatchling Lilly White, but it does not keep gaining white with age the way a Lilly White does.
Genetics
White Out is incomplete dominant, though most listings would call the gene "co-dom", and you will find it listed as White Out or Pos White Out. The hobby calls the two-copy form a whitewall, and Super Whiteout is also the name its originator uses. White Wall has its own page. White Out is inherited separately from Soft Scale, even though the two came out of the same colony. Anthony Caponetto of AC Reptiles developed it from geckos descended from his first Harry x Soft Scale pairing and gave it the name White Out.