Disable shader compilation completely for cloud build

Hi, is there a way to disable shader compilation completely in the engine?
I want to run the headless editor (-cmd.exe) on a cloud instance for a long-running offline processing task but it keeps wanting to compile shaders.
Using a custom source build of the engine, have made my own binary build and have also made a binary build of the game so I can modify engine source for this if need be. Upgrading from 4.25 is not an option at the moment.

Hi @GlassBeaver,

Did you find anything on this topic? I also need to turn off shader compilation completely but no luck in finding anything online so far.