I have recently started using custom made textures in my Portal 2 SDK maps and they work fine when running on my pc, but when uploaded and played on another computer all the custom textures come up white.

When uploading maps there is no section for importing made textures in, so how is it done when uploading, I could find no help on other sites so i'm hoping the community will help me out?

Thanks

You need to use the program PakRat to "pak" the custom textures into your BSP file after your final compile. If you compile again after this you need to repak everything, so it should be right before you upload. The "Scan" button will be very helpful if you only have textures to pak.