You can select WHICH items will get painted, you know that? :)
see the two radio buttons, bottom of the palette?
"A bti of everything"...."paint only selected items"
tick the paint only selected items, for precise choice.

standard commands to add/subtract items  to be painted by the paint brush.

CTRL and Click, or SHIFT and click, to select multiple things, so you can have a lot of different plants/objects in eco painter Population window, and select what you need, when you need it. 
so, you can then paint varied ecosystems as need

:)

"I'd rather be a Fool who believes in Dragons, Than a King who believes in Nothing!" www.silverblades-suitcase.com
Free tutorials, Vue & Bryce materials, Bryce Skies, models, D&D items, stories.
Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!