HowTo/Build a tree
From TrainzOnline
Under construction
Please be patient as I am learning as I go. This guide is using Blender, version 3.5.1 as Blender is free and Multiplatform.
Add-ons
Sapling Tree Gen - Nothing needs to be downloaded as it is built in to Blender. Just needs to be enabled.This link goes to the help page, with install, and list of options.
There is other free and paid add-ons.
Other tutorials
Artistic Render - Sapling Tree Gen A more in depth tutorial.