Check if an object has a material (map) that uses Real-World Scale?

collect all instances of StandardUVGen class that depend on any of your material/submaterial
check mxs reference or google for refs.dependents

and then do whatever you like.

this example will enable realWorldScale for all scene textureMaps (not only bitmaps)

(getclassinstances StandardUVGen).realWorldScale = true

btw. note that any third-party texturemaps like vray, corona etc may have this property right in the texturemap, so you may also check these maps for the according property

Thank you jahman, I'll see what I can do with it :)