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This folder is automatically scanned when the game boots for VPK files or
subfolders. Each subfolder or VPK is added as a search path, so the files
inside those VPK's or subfolders will overide the default game files.

See gameinfo.txt for more details.

For example, you might have the following file structure:

cstrike/custom/my_custom_stuff/ <<< This subfolder will be added as a search path
cstrike/custom/my_custom_stuff/models/custom_model.mdl
cstrike/custom/my_custom_stuff/materials/custom_material.vmt
cstrike/custom/my_custom_stuff/materials/vgui/custom_ui_thing.res
cstrike/custom/some_mod.vpk <<< This VPK will be added as a search path
cstrike/custom/another_mod.vpk <<< This VPK will be added as a search path


Mounting a VPK to the filesystem is more efficient that adding a subfolder,
because each time the engine neds to open a file, it will need to make a call to the
operating system call to search the folder. VPKs can be searched by the engine much
more efficiently. Each subfolder is a new search path that must be checked each
time the engine tries to open a file. So for optimal load times, always use VPK files
and don't make any subfolders in this folder!


Note that the following directory structure is NOT correct:

cstrike/custom/models/my_model.mdl

That will add the directory "cstrike/custom/models" as a search path, in which case the
file my_model.mdl actually exists at the root of the game's virtual filesystem.