The example tree I’m referring to is FoliageDemo.Speedtrees.ShaneTree_01 (although there are several that do the same thing).
They are using two separate materials which use WindDirectionAndSpeed nodes to simulate the movement.
However I’m unsure how they are making the top of the tree sway more than the bottom, and also how are they syncing the material for the leaves with the bark (so that they appear attached to the branches).
Another odd thing is I seem unable to replace the materials on the tree, they seem somehow baked into the mesh.
The reason I ask is I’d like to use a similar approach to create long pieces of seaweed that slowly move underwater.
Does anyone have any light they could shed on this?