What are Albedo.jpg textures and how to use it for leaves?

Hi. Im Liquid_Pages
Im new into making trees with this software (and also really new making games with Unreal Engine 4) and Im having a hard time trying to use properly the textures for the leaves in Treeit.

1st Issue:
I am using Megascans textures for my leafs and Im really confused on how to place them correctly so the leafs have the right opacity.

When I download the files fron Megascans I got 6 different files: albedo.jpg (I suppose this is the main texture for the leafs), also I got Displacement.jpg, Normal.jpg, Opacity.jpg, Roughness.jpg and Translucency.jpg. But when I assign the textures (albedo, normal and roughness) into the respective places the leafs still doesnt have opacity. How do I properly assign opacity to the leafs in Treeit?

2nd Issue:
I dont know how to individually separate and place the leafs into the "Leaf layers" beacuse 6 different types of leaves came into a single jpeg file and when I hit apply the leafs texture messes up and it shows a square texture with the 6 leaves. Ho can I fix this?

Thank you so much for your help!

Hi. These sets with leaves are more suitable to use it with Speedtree. With this software you can selectively mark individual parts of an atlas.

For TreeIT you should create images where only one leave is included at a time. You can do that very fast with Gimp, Paint.net or other software.