I’ve had a go at recreating this in the same concept in C4D and it came out as something I wasn’t really happy with it since it looked like it was the segments colliding in with each other as shown [here]
(Screenshot by Lightshot)
I’ve tried to use an extra segment instead of 4 and rotated it slightly in different directions (only to 1-2 degrees)
I believe he uses a combination of meshes, textures and decals to make that look. You can look on turbosquid to possibly get a tree mesh or just look on the mesh page itself and then find a proper “leaf” texture to make it look just like that.
First time I’ve seen that type of nature style be executed well. Good job. But I’d like to add that I wouldn’t recommend putting that type of vegetation if you intend to have the player come closer than you have the camera, because that ruins the atmosphere as you can easily see that they are decals.
Using parts for added details is always appreciated. However, if there is too much detail into one tree it may add unnecessary lag to the game. So maybe try using decals since they work a little more efficiently, and it looks good!