Whiteout & Whitewall Pics & Breeding Information
Whiteout vs Whitewall
Whiteout is what I originally named the gene or trait behind what is now called the "Whitewall" appearance, which was actually coined by my friend, Matt Parks, at Pangea Reptile. A Whitewall is basically just an "Extreme" version of the Whiteout, where the solid white lateral markings span the sides from limb to limb and reach up fairly high on the sides.I've technically been working with these since 2004 or 2005, but had no idea what I was looking at in the beginning. Whitewalls seemed to just pop up out of nowhere in my Harry x Original Soft Scale pairing. It wasn’t until years later that I figured out what the lower expression Whiteouts were - and why they were so valuable (they can make Whitewalls!).
Eventually I realized the less extreme form of the Whitewall appearance was so subtle in some animals that I didn't think anything of it. I had sold a ton of Whiteouts over the years with no idea they were capable of producing "Whitewalls". This explains why several breeders had "Whitewalls" just popping up out of nowhere, from adults that didn't really seem to have the trait.
Long story short, you can basically think of a Whitewall as a "Super Whiteout".
Whiteout & Whitewall Genetics
I believe this is actually a "codominant" genetic mutation. Specifically, a mutated allele of the same gene responsible for lateral "porthole" markings and lateral striping, which is seen in many crested geckos.
I also believe the Lilly White gene is another variation or mutation of this same gene, much in the same way a Lesser Platinum, Mojave, Mystic and a number of other genes are all allelic, or mutations of the same gene. If you are familiar with breeding different allelic variations together, then you realize the implications this could have in terms of making "combos" in the future.
If the Whiteout/Whitewall gene is co-dominant, that means Whiteout x Whiteout should produce 1/4 Extreme Whiteout (Whitewall), 1/4 Non-Whiteout, and 1/2 Whiteout.
Shown above/right is a Tangerine x Lavender/Black Pinstripe with some very attractive Whiteout markings. Note that the Whiteout lateral markings have taken on a pinkish tone, due to the presence of Tangerine pigment.
Whiteout & Whitewall Gallery
As you can see, other pattern elements, like Harlequin, Tiger and Lateral Striping, can have an impact on Whiteout/Whitewall markings, making for some great looking "combos" like we see in pattern morphs of other species.

Above is a C2/Citrus line Yellow & Cream Soft Scale (or Super Soft?) with some very nice "Whitewalls".
Great example of aberrant Whiteout markings on a gorgeous Tri-Color Halloween Harlequin Pinstripe
This gecko is a good example of one that could be a really nice Whiteout, or it could be a lower expression Extreme Whiteout (Whitewall). Genetically, I believe this is likely the latter.
C2 Citrus line Soft Scale with Whiteout markings and Tangerine pigment. This is one of my favorite geckos ever, and I do believe this is the "super" or Whitewall form.
Tangerine/Citrus line Pinstripe with Extreme Whiteout or Whitewall markings.
This is an Extreme Whiteout, or Whitewall - same gecko pictured at the top of the page. The pattern doesn't cut straight across, so some might argue it's not a Whitewall, but it is still, both genetically and morphologically, the same thing.
Something really weird/rare with some very unusual Whitewall markings. I wouldn't have necessarily known these were the same thing if I hadn't produced the gecko myself!
Great looking Tri-Color with Whiteout/Whitewall Laterals
Soft Scale Red & Cream Whitewall - RARE!