Super Mario 64 Tips

Handy Things in Wet Dry World
Two things, one: jumping into the painting very high will land the water level above what it can get from the colored thingy's.

Two: by lowering the water level there is an invisible warp between the two out croppings of the object that houses the third water level changer. (third starting from bottom up) This warp takes you to the cannon. Nifty and handy.

By doing this you can actually get into the black walls with low water level. Awsome and it is also possible to wall-kick too, either up to the cannon or into the black thing.