Toggle "dynamic image selection" on/off

Our app is configured to use dynamic image selection, works fine. But would like to sometimes not use it when loading images into the small screen version (phones, small tablets). The code to determine whether device is a small screen or big screen is in place. So if Screen is small, we’d like to use a non-scaled version of particular graphics - rather than scaling the half rez version up to the given screen size.

So it would be good to somehow state - dynamic image scaling = off. Load the image and then turn image scaling back on…

Haven’t found an answer across the web, any ideas?