Problem semi-resolved.
Its related to “Level of Detail” section > Mip Gen Settings
Selecting NoMipMaps looks right in texture window, but it gets noisy-flicker-greiny in the 3D-view when moving camera.
Return back to > From texture group (World) , it gets blurred in 3D view
I dont know what is. Wich version ue4.8 there was no problem.