cillider trees

[Final72]

I'm building a game and I noticed that the trees generated with Unity does not have that I pass through collider, where I find a tutorial for creating trees for Unity, who explains how to use them, then editor of unity??
Thanks for your attention

[Final72]

ahahaah collider ahahaha sorry I had to write instead cillider
maybe it's better that I sleep a little, instead of staying all night on the pc