You need photoshop,
I Recommend CS versions..
Well while you have the photoshop, go to unreal ed
Come to "DeusExCharacters" And then export the MJ12 Troop's texture.
(Well i couldnt find the texture, so i am using an example.. lol...)
Now while you imported as BMP or PCX, open it with photoshop.
Now, you see it open. Just change it to RGP Mode,
They are many ways you can make it black...
First:
You could just use the brush tool and make it black, But it will be dirty....
Second: You could right click brush tool and then just select the "Color replacement Tool" And select the black color and just do it near its nose and stuff...
Third: You could just copy its near skin or from some other picture with the tool called "Healing brush tool" And "Clone Stamp Tool"
The healing brush can copy things from the surface, but it will heal a bit so it will match the skin where you did the healing tool, what i do is first do "Clone Stamp Tool" and then i just paste something in its nose to the things i want to cover, and then i will use the healing brush tool..
So basicly healing brush tool doesnt help at all..
Lets just forget about the healing tool lol?
Fourth: Select the place where you want to do it black, with the tool called "Polygonal Lasso Tool"
Just select the surfaces, while its selected, go to "Image>Adjustments>Variations"
And then do it darker and more black you can.
You could multiply these ways and try until you get satisfied.
Thats all. Hope i helped
Well i dint typed it all, cuz.. i feel sleepy... :S
So ye.. maybe i will tell you how to copy things from other pictures with those 2 tools..