Hi everyone, thanks for checking my quesiton.

I baked an geo into brickmap then read it in houdini, used Pref(rest position) to stick the baked information onto the deformed one. It works well.

When I copy this object onto a box's points with copy sop, it works fine.

the problem is:

When I use point instance, it doesn't work. It seems that the point instance didnt read my pref attribute in, or something other got wrong.

please check my attach file.