Using hdri and backplate together

Hi guys, is it possible in Corona to use a hdri in the environment slot and then use a backplate but exclude the backplate from the effects of the hdri? somehow i am trying this but the backplate just appears blown out

sorry my mistake, i had overide material on, silly but stil is there a way to exclude this?

Take a look here: https://coronarenderer.freshdesk.com/support/solutions/articles/5000515605-how-to-create-background-material-in-corona-
Should be everything you need to know.

Perfect!