Step 1 : go to your blackops folder and open players, find config_mp
Step 2 : open config_mp in notepad or any text program.
Step 3 : add the following lines somewhere into your config :
seta r_zfar "0"
seta r_zFeather "4"
seta r_znear "40"
seta r_znear_depthhack "2"
Step 4: Save your config_mp.
Step 5: Right click your config_mp and make it read only.
OR download the one I made for you...
Credits :SupernovaAO
Virusscan ; Virus total
jOtT1
This screenshot represent a good view of the "Hack"
1.Look at the ground
2. Look at the fence