I am trying to set up some advanced foliage for a scene and was wondering if there was a way for a specific material to cast shadows (like leaves) but not themselves receive them (but still receive traditional lighting from other sources)
Thanks in advance,
Alex
I would like to know this as well.
I’ve managed to solve this problem for myself, so hopefully you can make use of my solution.
I’m using emissive color to overcome the self-shadowing. Hopefully the next UE4 update will finally include a toggle for ‘Receive Shadow’
Here’s the material I’m using for my leaves:
And here’s how it looks like in a test scene (It’s the trees in the red circles):
The material even looks good from the ground:
The 2 trees are built using different methods and both look ok using this material:
Hopefully this has helped you. 
This is actually the solution I found on my own heh. Not a perfect solution but it works well enough when lit during the day. It does unfortunately create some weird issues in darker scenes but it is definitely a start.
You have change the vertex normal ?(tree)
