I didnt know anything about origin brushes
the misc_model works good, but the misc_model_breakable works... sometimes. Oh well, ill try what you said.
Are you sure you didn't do something with the Editing tools installations between the use of the models in these two maps?
I dont think so... but i know i have like 50 million things in my jk2 gamedata\base folder... maybe something was installed wrong.