Distribution:

This slider will determine how the limbs are distributed over the trunk of the tree.  Lower settings will distribute the limbs more evenly over the tree.   Higher settings will distribute the limbs toward the top of the tree. 

Think of it in the terms:

• low setting = low branches
• high setting = high branches

Branches per Segment:

This slider will determine the number of segments each parent will have.  It has two numbers that you can set.  The numbers represent a lower and upper limb segment count that will randomly be used to place the limbs on the tree.  Lower settings result in more uniform trees.  High settings result in very tangled trees.

Note:  High settings can lock up your computer.  Use them with caution.

Number of Segments:

This slider will determine the number of segments on a parent.  Low settings can remove all the limbs from the tree.  High settings result in a dense appearance.

Branch Start Angle:

This slider will determine the angle of limbs at the thickest part of the tree.   Low settings result in the limbs pointing upward.  High settings result in the limbs drooping.

Branch End Angle:

This slider will determine the angle of limbs at the thinnest part of the tree.   Low settings result in the limbs pointing upward.  High settings result in the limbs drooping.

Trunk Thickness:

This slider will determine the thickness of the trunk of the tree.    The minimum number determines the thickness of the end of limbs while the maximum number determines the size of the trunk itself.  To make older looking trees, set the maximum number to a higher value and leave the minimum number to a low value.

There are other considerations when making "old" trees which will be discussed later in this tutorial.

Branch Thickness:

This slider determines the width of child branches of a tree.   The value represents a percentage of the parent size.