Xfrog trees: realistic distribution?

[MF_Erwan]

When you are using Xfrog trees, how do you distribute them?

I just put values I think they should be right...but in fact I have no idea of the result
The object is "CL02a_Grand_Fir.tgo"
Minimum scale: 0.8
Maximum scale: 1.2
Object spacing: 12m
Spacing variation: 1m
Then I added a distribution shader as density shader, with a coverage of 0.5. Fractal breakup scales are 50, 1000, 1. Maximum slope angle is 60°, Max slope fuzzy zone 10.

Are my values correct?
More generally, how do you decide of your population parameters compared to the size of the individual object?

Erwan

[neuspadrin]

well, every tree has a different size, and natural distribution... so really it just falls down to getting what is right on a per tree basis, so quite impossible to give the "heres the definite values".

[RArcher]

Neuspadrin is exactly correct.  It completely depends on the type of tree.  A big ancient oak generally can have more than 20m between it and the next one since they cover such a wide area, while some birch trees grow in groves where the trees are much less than 0.5m apart.  Really the only way to know is to do a bit of research and look at some photos online to make a better guess as to how to set up each population.