ok, I checked it out.
Your setup is correct, in fact, if you move the random strength value of the offset node, your objects will rotate independently. Here the problem is different: They seem to rotate all together because they are all rotating around the origin. They use the origin as rotation pivot point. The cause of this is not well explained in Mash but very important: you should not freeze the transformations of your objects when you move them to create your shape. All the pieces of your composition must have translation, rotation, and scale attributes so that if you zero them out, all of your objects are centered at the origin. Mash always uses the origin as a reference point, so it needs to have the coordinates of each object in order to calculate its pivot points in space.
Long story short: If you want to fix your scene, you need to:
Remove the actual Mash network,
Bake the global position of your objects (for this you need a script I´m afraid, or you have to bring each object to the origin, freeze its transformations and bring it back in position)
after this is done, you can rebuild your mash network and your objects will rotate around their center.
I have actually done this for you in the scene attached.
If this helped you, please accept it as a solution.
Ciao ciao 🙂
