Geometry nodes - lock distributed position in animation I have the following setup:

A plane with an ocean modifier.
A sphere scattered across this plane using geometry-nodes, with its Z coordinate aligned to the surface of the ocean. In other words, the spheres are &quot;riding the waves&quot;.
The &quot;Time&quot; attribute of the ocean is animated.

When playing the animation, I get the following problem:

The spheres are changing their distribution because the plane's mesh is deforming. I want to lock the spheres' XY positions, leaving the Z free to align with the waves.
This is the geometry-nodes setup for the ocean:

Thanks for any help!
What version of Blender were you using for this as I get different results using 2.93.0 Alpha - I get a small number of particles popping in and out of existence as the surface moves but most of them stick with the surface as the ocean modifier distorts it. Also, I note that the Join Geometry node in your example has two separate input nodes but the 2.93.0 Alpha version has a single &quot;multi-input&quot; input node, showing you're likely on an earlier version.
Since the Geometry Nodes feature is still under development, I'd suggest re-trying with the latest version and seeing if this improves the situation.