Okay, I upgraded to Pro, mainly so I could do Eco-systems.

But now I am running across something I don't know if it is a bug, or working as intended... and maybe there is a work around or a setting I am missing.

I am trying to make a grassy hill with trees. I want the whole object to be covered with grass/weeds/clover. I can make an eco-system that does that, but the problem is as soon as I add a tree to the ecosystem, the other plants thin out.

In the Density tab of the ES, I have overall density set to 100 (have even tried 1000 with minimal difference). Both Placement options are unchecked, and sampling quality is set to 100%. Offset from surface is set to absolute, with the slide at 0. Variable density is turned off and so is Decay near foreign objects.

On the Environment tab, everything is still set to the default.

If I take out the tree from the ES, and populate, I get 18k instances. If I put the tree back in and populate, I get 5701 instances.

Am I doing something wrong here, or is this a known issue?

Thanks