I tried to Answer this question: Can “x'/level” area effects be set at smaller sizes?
I was trying to find a spell with an area that can become bigger if your caster level is bigger: Control Water was the one I heard about (is there more spell like this, perhaps one could make it easier?)
I'm now clueless about the interaction with the Sculpt Spell metamagic feat:
(Complete Arcane p.83)
You can modify an area spell by changing the area's shape to either a cylinder (10-foot radius, 30 feet high), a 40-foot cone, four 10-foot cubes, a ball (20-foot-radius spread), or a 120-foot line. The sculpted spell works normally in all respects except for its shape. For example, a lightning bolt whose area is changed to a ball deals the same amount of damage, but affects a 20-foot-radius spread.
A sculpted spell uses a spell slot one level higher than the spell's actual level.
- The area of the spell (wich you can control) goes bigger with your caster levels, but I guess if you modify it via Sculpt Spell it will now have a fixed area that won't become bigger with your caster levels, is this correct by RAW or is there a rule I haven't found somewhere about this?
- You can create a whirlpool on the ocean or even cast it on water elementals so the newly shaped area could help in these 2 situations, it might be useless in the other situations (raise/lower unless there are other water around wich could make the 4 10-foot cubes really useful if you need to raise the water for 4 different small ponds within the long range of the spell)
- Of course some modifications of targets are useless in certain situations, a 120-foot line of water could probably not be a valid target area in this case, but the four 10-foot cubes to create multiple whirlpools on the ocean is quite clever if you need to affect more/less areas.