I am using T4toolbox, I am confused what the generator is for. I can run the following

public class Generator1 : Generator {

protected override void RunCore()
{

    Template1 t = new Template1();
    t.Output.File = "t3.txt";
    t.Render();

}

}

or I can run t4 script directly like the following.

Template1 t = new Template1();

t.Output.File = "t3.txt";

t.Render();

But I can do the same using t4 script without generator as well. So I mean can do the same thing with two approach "script --> generator --> template" and "script --> template", am I missing something?

Thanks