Sicklebrick has a great tutorial on portal gun texture editing. (BTW I couldn't get the texture patcher to work, just use the prepatched one in the download)
Also worth mentioning - VTFEdit and GCFScape are impossible to get working the first time, but they are VERY IMPORTANT, so just install as many Visual Studio runtimes as you can get your hands on and cross your fingers
I'm imagining model replacement is similar, although I haven't tried it. Probably just replacing a different file with dlc3.
Sicklebrick has a great tutorial on portal gun texture editing. (BTW I couldn't get the texture patcher to work, just use the prepatched one in the download)
Also worth mentioning - VTFEdit and GCFScape are impossible to get working the first time, but they are VERY IMPORTANT, so just install as many Visual Studio runtimes as you can get your hands on and cross your fingers
I'm imagining model replacement is similar, although I haven't tried it. Probably just replacing a different file with dlc3.