Hammer in some computers may show low quality textures. It is simple and possible, and I'll explain now how to fix this problem.
Part 1
EP1 Engine: Open the Source Engine.gcf. Search in the folder Bin for dxsupport.cfg. Extract this file to SteamApps/common/sourcesdk/bin/ep1/bin.
Orangebox Engine: Open the Source 2007 Binaries.gcf. Search in the folder Bin for dxsupport.cfg. Extract this file to SteamApps/common/sourcesdk/bin/orangebox/bin.
Part 2
This is for both engines: Open the file and search for the 10th keys to the 14th keys. Modify the "ConVar.mat_picmip" line to "-1". This is how it will become when you fix it:
...
"10"
{
"name" "memory [0-250)"
"min megabytes" "0"
"max megabytes" "270"
"ConVar.mat_picmip" "-1"
"ConVar.r_rootlod" "1"
}
"11"
{
"name" "memory [256-512)"
"min megabytes" "270"
"max megabytes" "550"
"ConVar.mat_picmip" "-1"
"ConVar.r_rootlod" "1"
}
"12"
{
"name" "vid mem [0-128)"
"min megatexels" "0"
"max megatexels" "140"
"ConVar.mat_picmip" "-1"
}
"13"
{
"name" "vid mem [128-256)"
"min megatexels" "140"
"max megatexels" "300"
"ConVar.mat_picmip" "-1"
}
"14"
{
"name" "vid mem [256-infinity)"
"min megatexels" "300"
"max megatexels" "65535"
"ConVar.mat_picmip" "-1"
}
...
Save the file and your Hammer is fixed. Now you won't get sicked when mapping.
Resource: http://www.mail-archive.com/hlcoders@list.valvesoftware.com/msg23546.html
Thread: http://www.fpsbanana.com/threads/136155