| Take your picture and a chosen texture, could be a wall, paving slab, dirt whatever.
Desaturate the texture and increase/decrease the brightness till the avg colour is around rgb 127, 127 , 127 (50% grey)
Then set the blending mode of the texture to overlay, if the effect is too much try changing to soft light, if its not enough change to hard light, you can also play with the opacity of the layer to get the exact effect you want. |