Material exclude from override material

Hi,

Does anyone knows how to exclude a material from a general material override? It is very useful to have it when you test clay renders and you want to exclude only glass or water etc.
I know that you can detach the glasses from the windows for example but i think a material exclude from override is faster.

Thanks in advance!

+1

Related:

https://forum.corona-renderer.com/ Override material: preserve X

Good Luck

+1 Would be very useful!