Jarrett has written an article describing a technique of using Altium for a DirtyPCBs order:
This is a pretty rare combo: using a premium PCB package with the budget board house.
Generally these small run PCB houses provide DRU and CAM files for EAGLE design rule checking and Gerber outputs, respectively. Because I’m using Altium, I had to make it up as I went along.
It gets much easier when you understand what Gerber files are. While we’re all used to standard, unified output formats that contain all of the data we need, Gerbers are very much still a holdover from manufacturing in the 80s.
When you export these, a whole bunch of files get generated. This is intimidating, but don’t panic! They all have different extensions like GBO, GTL, etc. These are all the same type of file.
Details at Jarrett’s blog.
Via the contact form. Thanks for the tips!