I got it to work. Here's how:

Download the effects.zip attachment below.

Paste the following files into your dod\materials\sprites\effects folder:
muzzleflash1.vmt
muzzleflash1.vtf
muzzleflash2.vmt
muzzleflash2.vtf


Muz1 will be your MG42 flash.
Muz2 will be every other weapon's flash.
So, you can get crafty by renaming HL2's various flash files.
Just be sure to include every vtf's vmt counterpart.

I do not know why the vtfs and vmts in the sprites.zip do not work, but they caused me to see black boxes.

Thanks pedrol and company.
And yes, the HL2 muz flashes have an excellent depth, warmth, and color quality.

did you change the material paths in the according ".vmt" file to the new path?

if you forgot to copy the vmt file, copy/port it over aswell.

Attaching effects.zip

Attaching sprites.zip

e-mail!

I am kinda new to this so what is the spirts for if I am only using the effects folder. Can you let us know where the sprite go or do they not work.

thanks