How to use these trees in Sketchup

There are a lot of nice trees on this website. How would you use them to get them to blend in the model.

https://www.google.com/search?q=alpha+transparent+tree&tbm=isch&source=iu&ictx=1&fir=NJ8HELt8r3gmiM%3A%2CU7Ot2rQ2TRcGSM%2C_&usg=__L_vWGlTOHMb_Z41wqmT_EWqBkCs%3D&sa=X&ved=0ahUKEwiM74rN4qjYAhVLy1QKHf9yAfUQ9QEINzAG#imgrc=0RVucbT9QCdKvM

Thank you.

You can import a transparent PNG image directly, explode it and turn it into a component. Move the component axis to the bottom of the tree trunk and in the component options, check the “always face camera” box. If you want it to cast a more or less realistic shadow, you can draw edges around the tree shape and erase the outside faces. Here’s my very, very old tutorial as a SketchUp file:
making_a_man.skp (215.5 KB)

Thank you Anssi!!!