I have a problem making a bumbmap, i got a b/w picture i want to use as bumbmap but i have no clue how, i saw a tutorial about 1 way: by using the noice option, but the surface i use is rather big so when i make many vertices it says i have too many, or, if i use less it looks horrible. I sorta figured there should be a different way of doing this but i cant seem to find it, can any1 plz help me?
Just go to the far right of your materials screen after you have loaded your texture, and press the ‘nor’ button. (there are two. the one you want is on the far right) then adjust the ‘nor’ slider which is right beneath the nor button to increase the effect.
I have a tutorial here -> https://blenderartists.org/forum/viewtopic.php?t=13986 on how to make textures in photoshop.
It may help you as well.
BgDM
thanks, got it workin 
and i like the tutorial although i dont need 'm 4 photoshop 