This is a shot of the pits with the Jason Peters hi res texture pack:

And here is the pits after my editing:

Try as I might, I can't find any mip which changes the square orange texture on the pit wall. I've changed all of the "pitXX" mips and nothing works. I've looked at all of the other mips in the folder and there's nothing remotely that color. I'm at a complete loss here.
The only thing I can think of is that the 3do for the pits must be colored orange, if that is possible?
Or is there something obvious that I am missing?
Thank you for any help.