hey saeedc,
precomputed visibility really made a difference like you said, thanks. But I’m having trouble to determine the expensive process. this is last ss with precom. vis. enabled
Game Engine Tick, Redraw Viewports and Frame Sync Time seem to be expensive processes. Any idea how to decrease or close them ?
By the way sorry for time issue it’s been couple of days instead hours 
edit: my device is nexus 4 by the way. Is it too low for development or optimizing can be done as well ?