Thank you all for the support,probably mistake was caused english is not my language....so,with "bruises" I intend the flexed skin under the pressure of something,for example a finger that push a single,little point on a body(cheek,abdomen,or another flexible body part)or also the effect of a stomping on the bed! This was the cause I don't understood the Photoshop reply... Probably,I need some kind of magnet,but I don't know if I need some particular magnet or if I've to modify in some way a pre-existent magnet(I never try this procedure),or if there's another way!! I apologize for my not clear question. P.S:I find usefull your link jelisa(I use an essential corel photo for my textures).