Hello,
here is next subject I dived into…
task:
1: enviroment: top-down dungeon with empty or solid block tiles.
2: there is movable character in this dungeon having light sourse…
3: all tiles is black(undiscovered) untill character actualy can see them with help of his light… (lamp… cvandle… whatever…)
4: light is blocked by solid rock tiles… and only first visible tile is shown to the user.
eny advice how to make it? 
I have a quick demo of dungion engine… but it must be fixed… 
too ■■■■ sloooow… (I hate flash performance…)
