Well, because of the way how Forest is dealing with the distribution in all its Areas, it's not ideal for distributing specific number of items. It's possible for example to limit the total amount of items under Display
- Max items
, but the distribution will be not uniform as it'll stop when limit reached.
There's a possible workaround to define the total number of items with help of 3ds max's Scatter Compound Object
- where you can set the exact number of Duplicates
. You can choose as the Source object a simple triangle and then to use the instancing power of Forest Pack, such Scatter object can be used under the Custom Edit
mode as Reference Objects
choosing the Distribute Using: Face Centers
. A similar work-flow would be to use a Particle System
& Mesher Compound Object
Hope you'll find it useful.