Okay, I figured this out some weeks ago. Thought maybe it will come in handy some time. I suppose the main thing you can do with this is speed up your environment creation or painting process. This is no high end professional technique. But maybe it will help some of you. And it´s extremely easy and quick.
So, here we go:
What you need:
Windows (as far as I know)
An image of some sort (should have different values)
Maybe you can do similar things in other programs but I´m using Microsoft´s 3D Builder. It comes with Windows 10 and I think Windows 8. Possibly there are also versions for earlier Systems.
So if you have Windows 8 or later on your PC you should check your program list for it. Should be at the top of the list somewhere...
Step one:
OPEN 3D BUILDER.
Step two:
Click "import" (says "Laden" in my German version. ) and open your image.
Add Media
Style