Effector Template
Effector Template adds an effector stack, the same Effectors list a Grow has, to a Houdini Digital Asset you build, so artists can add effectors to your tool. It is the effector counterpart of Mapping Template.
Make Your Own Tools says how to place it.
Using it
Put it inside your HDA. Target HDA is .. by default, the HDA it sits in. Promote to Target copies the stack, with its Add Effector button and response modes, onto the target's parameters and saves the HDA.
Name names the stack, and starts as the node's name, so rename the template first: one named Shape gives a Shape Effectors folder and an Add Shape Effector button. Two templates in one HDA need different names, and promoting again replaces the stack of the same name. Folder is where the stack goes on the target; a folder that doesn't exist is created.
New Maps Read From sets whether a map made from the stack's strength parameters starts reading Self or Parent. Decorations use Parent, the tree where the part sits.
Leave the template inside the HDA after promoting, because its rows link to the promoted parameters.
Status
Effector Template is hidden from the Tab menu in 0.7.3.
Effector
Effector runs your own VEX to write a direction that a Grow or Assembly Decoration can use like a built-in effector. Experimental.
Export Unreal Nanite Assembly
Export Unreal Nanite Assembly sends one tree, or a whole library of trees, to Unreal as Nanite Skeletal Assemblies: a USD folder with shared parts, one layer per tree, and a wind file per tree.