When i’m playing Brink i’m getting some black squares when i fire… When i throw grenades i also gets black squares… How do i fix this?? 
Here’s some pictures of the problem
Brink shooting problems
Have you already tried to update your graphics card drivers and directX?
I have not tried anything… I’ve played it right after the installation and there were no problems… Then i played it again the next day, and then the problem was there…
Mustang what are those commands for?
I’ve seen overlay issues caused by the OpenGL Windows desktop compositer in some games; usually it’s a game you ran previously that a reboot might fix, if not, try disableing Windows themes before you run the game (select the Windows Classic theme)…

Those commanda are used in the console, ingame.
Press ctrl alt del together to activate it, then type com_allowconsole 1.
Then type the commands above.
You get the console open with ctrl+alt+^ or whatever key is under ESC on your keyboard!
Now i’ve tried those commands… Didn’t work…
And Hoak ? I don’t know what u are talking about :S
[QUOTE=Mustang;366955]Things to try:
- Verify integrity of game cache
- r_shadows 0
- r_useHBAO 0[/QUOTE]
r_shadows & HBAO rendering are not related in any way in particles rendering (muzzle flash)

