View Full Version : EcoSystems - Population Presence Question

08 August 2006, 04:49 AM
I just have a simple quation as to how the input of the "Presence" value modifyer works. I see that when I import an object to be populated.. the default value for presence is 1.0.

I am trying to populate an EcoSystem with 2 objects and I want "Object A" to be 30% of the Ecosystem and "Object B" to be 70% of the system evenly distributed.

If I want the above ratio, do I treat this 1 like the 1 in probabilty in mathematics? That is to say that if I want the desired density, do I put .3 (30%) for "Object A" and .7 (70%) for "Object B"?

I tried that but it does not look correct. How does this value work when multiple objects are inserted to the population.

Thank you for the help in advance.

08 August 2006, 02:26 PM
It does work that way. However, you must also take into account other factors like their size, if you have the decay near foreign objects turned on, avoid self intersection, and so on

08 August 2006, 04:18 PM
Another thing to try if it doesn't look "right" to you, is to change the density. Also, remember that you can set the density higher than 100. On vertical terrains I often use a density between 400 and 800%.

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08 August 2006, 04:18 PM
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