Hi
Using a MOPs Instancer followed by a MOPS_Randomize to scatter brick debris on a terrain.
The debris is correctly sitting on the terrain vertically (ie not floating) however the orientation of the debris remains always perfectly vertical, instead of changing according the the slope of the terrain geometry.
I have ‘Orient Copies to Surface’ enabled.

The attached picture should make this clear


Any MOPs experts know what I am doing wrong?

Difficult to tell without looking at your file. When I scatter a bunch of cubes along a deformed grid, I get the correct behavior with the cubes alignment conforming to the normals orientation. I guess a good question would be, does your terrain mesh have correct normals?