sludge-zbuffermaker: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/sludge-zbuffermaker - from package: sludge-devkit

You may install the required package with command apt-get install {package}

Error in other languages:
sludge-zbuffermaker: bevel nie gevind nie
sludge-zbuffermaker: comandă negăsită
sludge-zbuffermaker: comando não encontrado
sludge-zbuffermaker: commande introuvable
sludge-zbuffermaker: command not found
sludge-zbuffermaker: käsku ei ole
sludge-zbuffermaker: không tìm thấy lệnh
sludge-zbuffermaker: komanda nerasta
sludge-zbuffermaker: Kommando nicht gefunden.
sludge-zbuffermaker: kommandot finns inte
sludge-zbuffermaker: komut yok
sludge-zbuffermaker: nie znaleziono polecenia
sludge-zbuffermaker: níor aimsíodh an t-ordú
sludge-zbuffermaker: no se encontró la orden
sludge-zbuffermaker: no s'ha trobat l'ordre
sludge-zbuffermaker: opdracht niet gevonden
sludge-zbuffermaker: parancs nem található
sludge-zbuffermaker: perintah tidak ditemukan
sludge-zbuffermaker: príkaz nenájdený
sludge-zbuffermaker: příkaz nenalezen
sludge-zbuffermaker: команда не найдена
sludge-zbuffermaker: командата не е открита
sludge-zbuffermaker: 命令找不到
sludge-zbuffermaker: コマンドが見つかりません