Hey, how can I transfer only the Anim data without the actual Geo to Solaris,
In my case I have:
-Robot
-armR
-armL
-LegR

and I have the same model with the same structure animated,

I would like to do something similar to what you can do with Alembic Layering where you can just save the trasforms but without the actual geo

How can I save in a Layer just the trasform data without the geo?

I realize that this is a year late, and you've probably discovered the answer to this by now, but from what I understand you have two options. If the character is only doing rigid transforms, then you can set up your hierarchy so that each limb is a separate object that can then have transformations applied to it.

However if you are doing deformations then it is my understanding that only option is to override the entire cache with another cache containing the animated deformations.

NFX
However if you are doing deformations then it is my understanding that only option is to override the entire cache with another cache containing the animated deformations.

but you can still have layer containing just positions without any topology data just like Alembic Layer
you have control over it in SOP Import LOP or it's wrappers like SOP Modify LOP, ...
like setting Topology Attributes import to None, etc...