Help Please: Flat patten alpha texture

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3dgirl's picture
Posts: 2

Hi, I'm new here this is my first post, 

I'm following the sculpting stone with morph targets Zbrush free tutorial this one:

it's been great but I would like to create my own flat black/white alpha's to create my own unique designs with textures from my own photographs into a stone carving effect.

The type of flat alpha black/white, this texture was included with the project files:

How do I go about creating my own flat patterned alpha texture from my own photographs in Photoshop.

Any help would be much appreciated.