Picture question

On my map with fog it was 23084 kb.On the map with lots of torches and lighting effects it was 56011 kb.In a basic house 40x15 it was 5609 kb.


Also in some of the tutorials I read,they encountered similar problems when running certain weather with pictures on the screen.They used wait commands and end event processing to negate the lag effect but I have had no luck with that.