@Bone Copy
I think you are also misunderstanding what I'm saying because when I was talking about layers, I meant the actual coding of the site itself rather than the individual .psd files that you download from the CA page, aha, and with that I was solely talking about the base - you can dynamically output an entire SINGLE image in coding from separate files, not just layered overtop of each other like how apparel pieces are separate images but go overtop of the wolf's base image, but actually as a flattened / merged image itself, can be created dynamically through coding.
That's what I was talking about, that there is the potential that Lorwolf works in this same way by taking its three layers of its base (base coloring, shadows, and lineart) and outputting them as a single file through CODING rather than generating it via an art program, where its HTML output looks like a single image, but what's happening in the background is more complex than that. In which case scenario, they could do something like dynamically layer markings UNDER the lineart and shading files without the need to clip them over the image file itself like you do in Flight Rising's skins.
EDIT: Just to be even more clear: the layering effect that I was talking about can be created through scripts like JavaScript, PHP, Python, etc. It's on the coding side of things, rather than the .psd file shenanigans. That's what I was asking if things were dynamically layered.
But, if I can clip lineart / shadow layers over shenanigans without it counting as "altering the base" then that's good at least. It's too bad you apparently have to remove the silhouette for background shenanigans instead of Lorwolf simply z-index layering it with CSS down below the wolf image...