Actually that is the set I bought, just never really used them yet, it was always easier to use a premade background or something but now i want to try use the brushes to make a nice detailed color background to fit my scene, and the tutorial that came with is vague in some steps I dont understand and so far what I have tried by folowing that doesnt produce real detailed results :(

specially i dont understand when it ask me to duplicate a layer then change the layer color to black or white? any help with that