In the scene, the spruce is 21 meters high:

Name: Spruce_2_2012_corona_vray
Version: 2012
Units: Centimeters
Dimension: 819 x 785 x 2143
Polys: 1 021 598
XForm: Yes
Box Trick: Yes
Model Parts: 1
Render: Corona, Vray
Formats: 3Ds Max 2012, OBJ
Material library: Corona, Vray

Who works in a V-Ray version lower than 3.1 be careful, in the materials in the BRDF section there is a Microfaset GTR ( GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward – which is preferable for you.
For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of materials is configured with PBR in mind.