If anyone knows of a cool Photoshop export script, man, by all means show me that or send me a thread link or something. This is sort of a poor mans version of of the same thing.
Say you got a Photoshop folder layer,
-convert the whole thing to smart object,
-then in the root portion of the psd, resize down a level. ex 2048 to 1024.
-smart layers retain resolution even if you crunch the texture. This way you can save in-game resolution freely without having to reopen and resize again later.
It maintains your working resolution while allowing you to save in-game size.
Here's example:
https://www.dropbox.com/s/omom5vclqpbgvo6/smart%20object.zip?dl=0