Blender Stack Exchange is a question and answer site for people who use Blender to create 3D graphics, animations, or games. It only takes a minute to sign up.
Sign up to join this community
In Blender 3.0's geometry nodes I would assign a random per object material like the first picture. But the result is like the second. The nodes in the pictures are only one of many tests that i did but i can't obtain the desire result. I apologize for my ignorance, I don't know a lot of all node functions, especially with this amazing new version that I am still learning to use.
You could separate the objects after instantiation and assign different materials to the two resulting groups:
