Z-offset

I have just generated a tree with Gen3 (link to it is on the wiki), and I have setup the leaves with z-offset 2, and when in game viewed in 1st POV the leaves appear just fine.
When I switch to 3rd POV and hover the mouse over the avatar, this causes the avatar to become transparent, but in doing this, it causes the leaves around that part which is transparent from the avatar, to disappear

So i'm just wondering, if the avatar transparency has an offset as well to counter this effect.
When I switch to 3rd POV and hover the mouse over the avatar, this causes the avatar to become transparent, but in doing this, it causes the leaves around that part which is transparent from the avatar, to disappear

So i'm just wondering, if the avatar transparency has an offset as well to counter this effect.