This is a fully procedual environment! You can control the amount of trees in any any of the plane by drawing on the weight painting channel.

The grass and trees have both been built in geometry nodes which gives you lot's of control over stuff such as:

1. The minimum distance between trees
2. Control over the random rotation and scale of the trees
3. The density of the grass and trees!
4. The option to switch out the models non destructively
5. And so much more!

This project may be updated with a bigger variety of models in the future!

The HDRI cant be downloaded from this listing and is from https://polyhaven.com/hdris