Ocean Flat Tank, how to make a surface after a wavetank of arbitrary shape (for example, a lake or a pool) with waves like in the picture? I work in Redshift.

In most cases you would use an ocean spectrum on a flat grid that has been cut or modeled into the shape of the body of water that you want. The ocean spectrum is a deformer that will give you body-of-water type motion without needing to run a simulation. You would use a FLIP sim tank setup if you also want water interaction, like a boat wake or splashes. Check these out:

https://www.sidefx.com/tutorials/deep-dive-into-ocean-spectrum-node-in-houdini-1/ [www.sidefx.com]

https://www.sidefx.com/tutorials/infinite-ocean-effect-with-flip/ [www.sidefx.com]

All is well, the little dragon dives in boxing, but how to make boxing in the middle, and at the edges there would be a surface of arbitrary shape?