Max Slices:
controls the maximum number of branch sub-sections
that are allowed to be rendered
Split Chance:
controls the probability of a new branch splitting off of a
already existing branch
Angle Mod:
modifies how much a branch can change its angle by for each sub-section
Height Mod:
multiplies the height of the branch-subsections, making the tree
taller
Width Mod:
multiplies the speed at which branches spread out, making the tree wider
Starting Size:
Changes the radius of the stump of the tree, making the tree wider
or slimer around the base
Size Decrement:
Sets the amount by which the branches get reduced in width for each sub-section
Branch Variance:
Changes the percentage in width that a child branch can be smaller than a parent branch by. Generally makes trees look more "natural" and random.
Sections:
controls the number of faces that each sub-section of a branch has. Increase to produce more rounded looking branches