====== Satellite Texture to Mask ======

**Satellite Texture to Mask Tutorial** by Opteryx

This is a basic way of turning your satellite texture into a simple mask with Photoshop. It will not make a perfect mask, but something basic to work off of.


====== Load Satellite Texture ======

Load your satellite texure in photoshop.

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====== Adjust Hue / Saturation ======

Go to Image > Adjustments > Hue/Saturation, now turn the saturation to 100 and adjust the hue depending on your result in the next step, this something you'll probably have to go back and forth with to get good results. The idea is to make each surface type stand out as much as possible.

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You might also use the replace color tool here to separate the surface colors more. It can be found in Image > Adjustments > Replace Color.


====== Adjust Brightness / Contrast ======

Now go to Image > Adjustments > Brightness/Contrast and check the Use Legacy box, the turn the contrast slider to 100.

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This will turn all the colors on your map into 8 colors and these are:

White RGB: 255,255,255\\
Black RGB: 000,000,000\\
Yellow RGB: 255,255,000\\
Red RGB: 255,000,000\\
Green RGB: 000,255,000\\
Blue RGB: 000,000,255\\
Cyan RGB: 000, 255, 255\\
Magenta RGB: 255, 000, 255

These RGB values are important as they determine the surface type in your Layers.cfg


====== Replace Color ======

This may vary depending of what your original Sat looks like, but colors like red, yellow, black, white and green tend to be dominant. You will probably have stray pixels of blue, magenta and cyan that might be hard to find. To remove these, Use the pencil tool.

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Then go to the color picker's foreground color.

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Select the color you want to remove (for example cyan), place a pixel on the sat, go to the Replace Color tool again and select that pixel.

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Now go to the Result box and the bottom right and enter the RGB value of the color you want to replace it with.

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Now you should have a somewhat useful mask for your terrain. It's also important to note that this is something you'd probably want to do after you've cleaned up nasty artifacts in your sat like shadows etc.