Forest canopy stamp

Right now I'm using the trees to create the outline of a forest and then manually remove the bottom of the tree stamps to create a canopy on the top edges of the forest to create a uniform forest shape. It would be soo much easier to create a forest edge and canopy if there were stamps that was just the top parts of the trees with the bottom fading out.

See this experimental map as a reference:

https://inkarnate.com/m/LLbwr0

I want to create forests that look like this:

https://pbs.twimg.com/media/GZoaMPZWEAc0T4A?format=jpg&name=large

and this:

https://danielsmaps.com/wp-content/uploads/2023/01/forest-styles.jpg

Bonus:

If we can get trees with just the bottom, left and right side so all edges of a forest can blend into the forest shape