koobas.hobune.stream
Passing through building
I made building in blender and i exported it to unity like object (.obj) and then my character is passing through that building.Then i generate colliders and then my character cant pass through the walls of building but character can pass through the door too.What i need to do 
I assume you're using a Mesh Collider component? You might need to uncheck (and read up on ) Convex.
You need to add the appropriate colliders in blender - not unity. Alternatively, use ProGrids, ProBuilder and Polybrush (free unity store asset tools) to do model work inside of the editor.
It's not a glitch.. your lack of detail (what kind of collider.. box, mesh?) makes me assume you added a box collider which would stop you walking through the wall and door.
You could use a mesh collider but that would drain performance for a large scene, so you're better off using the proper workflow (adding that stuff in Blender) or use the ProCore toolset (progrid, probuilder, polybrush) that was added to unity essentials.
