Using separate images for color/transparency/etc. - export to Unreal?

Not sure what this is called in Blender, so I haven’t had luck searching!

Been a while since I used Blender so I’m a bit stuck.

I have a bunch of source files (from Quixel/Megascans actually) that I need to use on an object to import to Unreal Engine.

That said… I’m having a hard time finding out how to set up nodes to add the channels (if that’s what they’re called in Blender) and export so that it will come into Unreal Engine.

Can anyone recommend a tutorial/guide for this?

Here are 2 videos… First talks about what is needed…and second is how to use a addon they created to simplify the process…which is complicated, hince the addon.

1st Video
2nd Video

Good Luck!

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