Hi, Please can someone assist me with this issue:
I have imported tree assets from TreeIt into unity. There are 2 materials one for Bark and one for Leaves and a model for the tree.I have also set the shaders to the correct nature shaders - Nature leaves/Nature Bark. Dragging and dropping the tree asset into the scene works perfectly and materials look great but when I load the tree into the terrain painter the trees show no leaves 
See screenshot below (trees on left dragged individually and trees on the right are painted with terrain tool)
Have you managed to get something working? I also am looking for a solution.
what format is the tree model in? (.fbx, .gltf, etc)
I had the same exact issue and here is what worked for me:
- I created a new empty gameobject, dragged the tree model in there and added a “LOD Group” component
- In the LOD Group under each LOD (LOD 0, 1 & 2) add as many renderers as you have tree objects, in my case 2 (One for the log and one for the leaves)
- Drag the Objects into each renderer
That fixed it for me, I know it isn’t best practice since that’s not what LODs are used for but whatever
did this!! it worked, the game just became super laggy..think thats jss my computer tho