The Hotspot Texture Maker is a way to take normal textures (not included) and make hotspot/trimsheet textures out of them using the included hotspot layout masks and TextureGraph functions inside Unreal Engine's built-in TextureGraph plugin.
How it works
Get a texture from anywhere to be the "top" layer (e.g. metal)
(Optional) choose a 2nd texture to be the "bottom" layer (e.g. rust)
Using the included texture graph function, pass them through it along with the included wear masks and edge masks
Export to final textures
It outputs them to a base color, normal, and a packed ORM Texture (AO, Roughness, and Metallic).
It is more hands-on than just a simple "put 2 textures in and hotspot come out" because it lets you dial in a lot of things to get a good looking hotspot depending on your goals. I've made a small tutorial series on how to make a few different hotspot textures using quixel textures.
It won't replace a dedicated texture artist in substance designer, but it'll get you great hotspot or trimsheet using one of the 9 included layouts.
Requires Unreal's built-in TextureGraph plugin to use (this plugin automatically enables it).