Of course unzip it, It will be difficult to use otherwise. You can do anything with procedural textures really but there difficult to get perfect sometimes cause the way the work in 3d. Pictures are easier and right now way more powerful in a way for really detail specific type textures. Like the the trees are both. There is no way to answer that really. If I can't make it procedural I'll whip up a seamless texture instead. It don't matter you can MIX them to. I do that to to get the exact effect I want. Maybe the color of my textures is not right or or maybe I want to use a procedural bump on my picture. Anything is possible really. Building textures for me work better using pictures cause there basically boxes. Procedural textures can give you problems on one side of the box. Like look at the cage. Ya I need that on my building bit I don't want to have the cage show on the roof. See the problem? Now edit it so the cage does not draw on the roof. It's easier to use picture meshes. It can be done but it's really time consuming. Pictures are easier to scale to. Sometimes you get unexpected results scaling really complex procedural textures that are seemingly hard to fix. You work with them awhile you see they both have advantages and disadvantages then they can be mixed endlessly together and that has advantages and disadvantages. I think pictures also render faster cause there basically 2d with a bit of bump of highlight if you actually add it. I could spend 10 lifetimes here explaining it all really. Been using them both now for 2 decades and I still learn stuff. You learn by doing and asking questions when you can't figure it out. Now you got the web. I never had the web when I was where you are right now. I had to learn trial and error. It was perplexing to say the least.