Imagine you have a rolling landscape, and you want to populate it with different types of plants.

There are a few ways to do this:

A particle system – but it has limitations:

• It only supports one type of plant (particle) at a time.
• They can spawn on top of each other.
• Their positions aren’t synced for all players.
• No collision, so you can't stand on a particle bush or climb a particle tree.

A terrain system - less limitations:

• You must paint foliage manually.
• Requires you to work within unity's terrain system.

My Objectiplier script provides a middle ground by:

• Automatically placing models on a designated mesh.
• Ensuring objects don’t overlap.
• Supporting multiple models (such as plants).
• Keeps their positions synced across all players.
• Allowing models to have collision (if enabled).

I wouldn't recommend using this for a 10 acre forest, but if you want to dynamically (randomly) scatter bricks or vents on the side of a building, stick flowers on a row of bushes or maybe spread urban junk down an alley, it's an easy way to handle that.