Camera entering objects

I have several imported .obj files in my game. These object's only components are mesh renderers. The only issue I am having with them occurs when the player approaches these objects from certain angles. If approached from just the right direction the player camera will end up essentially inside the object. Essentially if the player "slides" alongside the object at the right angle they end up partially inside it. They cannot walk through the object or anything just get a glimpse of the poorly rendered interior. How can I prevent this? I have tried adding rigid bodies and colliders to the player camera but the effect remains. Any ideas? Thanks.