why the scene quality suddenly turns bad after building

[anonymous_user_0be603da]

][2]hello.
I am new to ue4,and have been working on this scene for a week now.everything turns fine,but after the last building light,the scene quality turns very bad.and it gets worse once i played it.It showed that texturestreaming pool was over ,but things didn’t turn better after I fixed it.Does anybody know what cause this,

thank you very much!!!

[anonymous_user_0be603da]

I just find out that it has affected other projects,all of them look terrible

[anonymous_user_0be603da]

problem solved.somehow the engine scalability quality turned very low.what a relief.