MPI Tutorial Valve released a new feature in the compile tools for orange box: VMPI MPI can be to distribute the compile process via a network to many pcs and speed up your compile process. At the moment mpi does only work for vvis, mpi for vrad is broken. This may get fixed in a feature version of the source sdk. MPI Worker Tutorial First step: Check if you have the Source SDK installed and you did run it at least once. Second step: Find out where your vvis folder is and copy paste it. It should look like this: C:\Program Files (x86)\Steam\steamapps\<Your Steam Name>\sourcesdk\bin\orangebox\bin Third step: Open the command line. You do that by either finding it in the accessories menu somewhere. Or by typing win+r and then cmd. Forth step: Navigate in the commandline to the vvis folder. You do that by typing something like: cd C:\Program Files (x86)\Steam\steamapps\<Your Steam Name>\sourcesdk\bin\orangebox\bin Remeber the cd command at the beginning. Fifth step: Start vvis with this command in the commandline. In this step you need the ip of the MPI master. Ask the map maker for it and replace <ip> with the ip: vvis.exe -mpi_worker <ip>:23311 The command should look like this one: vvis.exe -mpi_worker 126.96.36.199:23311 Sixth step: Wait, vvis can take long even with many pc working on it. MPI Server tutorial: You are tired of waiting 10 to 30 hours for vvis to finish it job? This is the solution against this. First step: If you are using a router you have to forward port 23311 to your pc. See http://portforward.com for a port forwarding tutorial. If you have a direct connection to the internet you have to enable port 23311 in your firewall. Second step: To add enable mpi support you have to add the -mpi switch to the vvis command. For the pretty progress bar you can add -mpi_graphics: Another Interesting switch you can use is -mpi_showdistributeworkstats. To do that you have to go to the export options. The command should look like this now: Third step: Find out your ip. You can use a service like http://www.cmyip.com/ to find it out. Forth step: Distribute the worker tutorial with your ip inserted into step 5 to people who are willing to help you compile your map. You can find people in the #empiresmod channel on irc.gamesurge.net. More informations on VMPI: http://developer.valvesoftware.com/wiki/VMPI Edit log: -Added -mpi_showdistributeworkstats -Added log to the developer wiki.