This list should hold all layers with vegetation models to separate them from other models. Like under the objects list, models can be referenced by
Layers in this list have the same options as models in the objects list
https://sourceforge.net/p/biosphere3d/wiki/Objects/#3d-models
plus the option to place models above water and the additional layer option “Render Mode”, which allows to render the models with or without leaves and with adjustable colors for the trunk and leaves.