Closed, since this answer answers pretty much everything
I have a vinyl mat and a water-soluble pen, this allows me to have any dungeon imaginable to put my figurines into. My problem is: how and when do i draw the dungeon?
If a draw the whole dungeon out at the start of the mission players can guess where encounters and treasure will be and if i want a maze-like section, they can already see the exit. This encourages meta-gaming where the players know the layout of the dungeon but the characters do not. (Of course, in the case where one character has a map this is no problem.)
How can i avoid this? I thought maybe draw based on the characters' line of sight, however i don't want to stop play every time the party enters a new room or turns a corner...
As a side note, the mat is double-sided with squares on one side and hexes on the other. I prefer drawing outdoor scenes on the hexes, while town/dungeon scenes are using squares. With an outdoor scene, is drawing going to be any different? for one, the characters can see farther...