Hi! Thank you so much!
As for the sss - spoiler alert: it’s not actually using lumen! Just the normal sss shaders. It kind of gets away with it because there’ so much other green in the scene - including the walls and the bamboo stems (which does cast lumen GI) that it more or less evens out… I’ve linked a little breakdown below which might sort of explain it - if you look closely at the leaves, they’re not casting GI but they are sort of receiving it…
As for nanite - no it’s disabled for all the foliage and you’re right - its just using the two-sided-foliage shading model. Gets around that weird distance popping thing… And no need to make the leaves double sided actually - it just works fine if using two-sided-foliage shading.
Apparently this should all be fixed with the final release - but yeah - at the moment it’s a lot of workarounds to try and get a decent result…