Multi-Texture Shader

Ever wanted a model to have more than one material applied to it? With this shader, up to four texture sets (along with metallic and smoothness sliders) can be applied to a model! With just a few UV masks, you can reuse any material you've already created, combining them onto any model.
This shader gives you the ability to apply multiple diffuse and normal maps, as well as multiple layers of specular metallic and smoothness sliders, and apply these via bitmasks to a model. This enables the reuse of textures throughout the production of a game or application,and makes the art style internally consistent with a lower memory footprint. The entirety of this functionality is done through a single surface shader. This entails a higher computing cost at runtime, but allows you to more easily use multiple materials across entire projects, instead of baking diffuse, normal, and specular maps beforehand.