Z-fighting from revit model

Hi,
I am looking for a way to stop z fighting in one of our clients' revit model.
We got the model and imported it in Unity but in the revit model there is an interior and exterior wall but with exactly the same measurements. the model is around 500mx300m with a lot of rooms so doing it by hand is just not the way to go.

Does anyone have an idea on how to solve it? I googled it and found some articles but nothing that suits my case.

Kind regards,
Dries

 

Hi, so if I understood it correctly, you just want to delete or substitute an element of your modl right? If I am not wrong i think the Reflect extensions package its still compatible with the newer reflect versions, and one of its features is to search and select elements of your model filtering it by its metadata. Also in the Reflect samples you can find a similar tool.