I have tried converting various tree species to Nanite and have had different results. In some cases the “core” is too light and gives the tree a “flat” look.
With this species of tree transformed into nanite I found a disappearance of the polygons at the edge of the frame.
These are the Project Settings parameters used.
May be appropriate to draw up a handbook of instruction for tree asset developers to build assets that work correctly with Lumen Ray Tracing.
Another issue that I noticed when changing intensity on the SkyLight a green glow appears on the trees (in some species) which disappears with the movement of the camera (only with Lumen Hardware Ray Tracing).
The Skylight also does not update the brightness passing from a low intensity to a higher one, I have to return to the zero value and then set it to a positive value.