Save PNG writes the algorithm and every parameter into the
file's metadata (readable in the Comments field, e.g. Windows file
Properties). Load image reads a Tree Lab PNG back in and restores
those settings, including a drawn canopy region.
Paint where the canopy may fill. You define the
container — the tree that grows inside it is not defined, so each run still
varies within the region. Works on all three algorithms.
Adjusting a knob changes the current tree live — no restart
needed. Canvas size and point counts take effect on Restart. Use
Restart leaves only to re-run foliage on the same trunk. Sliders show a
recommended range; the number box beside each is uncapped.