I'm fairly sure it must be using a world space map when baking low-low in substance - you'd get an empty texture otherwise. iirc you can composite a tangent space normal into that at bake time as well so i think that covers what you're asking for. since you mentioned the sobel/seams interaction .. yes - that hadn't…
It's all look pretty much like CelShading Toon Shading (you can google both and how it works.) with flat colours. In Arnold you have basically there a slot for Diffuse Flat Colors and can readjust color of the Shade that works something like on the screenshot. Shade color also can be connected to the diffuse color with…