Effect is pretty cool and gives me some scene ideas.
Would request the following options:
1. Way to scale down the area without losing interactions, such as the size of a bathtub, bucket, or even a glass of water. (ColorScale can change the size, but causes physical interactions to stop.)
2. Option for a circle perimeter instead of a square
3. Option to change color and opacity, possibly using a companion plugin that can be applied to the asset. (ColorScale doesn't affect the color or alpha for some reason)