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Draws circles on the map map in places where objects are located. It can be used for painting maps under objects.

Also could be handy to create various object-based masks

Stroke GUI looks much in common with Flatten generator. Despite of the generators use the different algorithms, the main set up principles are the same.

Properties:

• Radius: the radius of the adjusted areas (including the falloff area), in world units.
  Radius: 10, 50, 100

• Hardness: the percentage of fully flat land radius compared to the total radius. Varies from 0 (only the center pixel has the value of one) to 1 (all circle within radius has the value 1).
  Hardness: 0, 0.333, 0.666, 1

  Size Factor: multiplies the changes applied by this generator depending on the initial object size. For example, when factor=1 if the object’s size is 2 then all of the stroke sizes will be doubled.
  Size Factor: 0, 0.25, 0.5, 0.75, 1

• Use Noise on Falloff: applies noise in flatten stamp transition area. Used to make the stroke fit organically into surrounding noisy terrain.
  No noise (left) vs Use Noise (right)

• Noise Amount (when Use Noise is turned on): the amount of falloff noise applied. Noise Amount: 1, 2, 5, 20

• Noise Size (when Use Noise is turned on): the size of the falloff noise pattern.
  Noise Size: 2, 5, 10, 25