I am looking at potentially getting Earth Sculptor, but it is an old app and I'm afraid it won't be the best use of my limited funds, so I have been on the fence about it for a long while now. First I'd like to exhaust other options, mainly I want to understand how the detail Mask maps work exactly, what they need to be composed of, and how to go about making one manually. It after all is just a PNG so there has to be a way, right?

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My system: i7 3770 Gtx1060 6GB