Floating on water with Platform behavior

Hi

Does anyone know how I might go about making a character controlled by the platform behaviour appear to float on the surface of some water?

what I'm trying to create is a setup where if the player has an item they will sink, but if not then they will just bob up and down on the surface.

You could create an invisible solid platform with sine behaviour so when the player is on it they will appear to bob up and down.

I'd suggest something like: If the player is overlapping the water, set platformer gravity to zero unless the item is held (check a variable). The bobbing motion can be achieved with the Sine behaviour.