It handles inner lines using a special layout as mentioned in the documents. In this case I just used Blender and transferred the normals from simplified meshes. The most important thing is probably getting the normals right. The outline is just a basic expanded mesh with inverted normals.The vertex colors of the outline mesh are a darker version of the character e.g coat = dark orange. If it is, use the light color (main texture) otherwise use the shadow color (main texture * tint texture). Basicly you just check if the surface normal is facing the light.
The links at the footer cover it in more detail. This is my first Unity shader and I haven’t cleaned up the code at all. Just posting a shader based on Guilty Gear Xrd.
