Hello,
I’m new to houdini,so I don’t know much.
Is there a way to import particle fluid surface (water fluid displacement) into a displacement texture map?
For example, oceanEvaluate node have “export to texture” tab and I can export displacement texture for FFT ocean.
Is it possible to do the same for a particle surface mesh?

You could create a grid and use a ray node to get the distance from the grid to the particle fluid surface. That distance could then be exported as a texture map with something like the Labs Simple Baker which would give you a displacement texture.