The default falloff setting is linear, to change the falloff curve click.Enter Exclude Range values to define the distance affected measured from an exclude area's boundary.Enter Include Range values to define the distance affected measured from an include area's boundary.Click Falloff > Density and Falloff > Scale.Using falloff controls it is possible to affect the density and scale of objects near an area's boundary. To add scale and density falloff along a boundary Adjust falloff, Add Geometry items and Image Mode as required.Select the the Forest area from the list and click on Invert Curve.Clone the Forest Object use in the last steps.To create a separate region around the base of each tree. Change Falloff > Exclude values for Density and scale (see below).Adjust the Scale value if necessary to change the exclusion size around each tree.
To exclude scattered items using another Forest object If you need to use multiple objects that are a large distance apart, assign each one as a separate area. You can also use groups but this is recommended only when the objects are close together.
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