In the archive, there is a 3ds Max 2018 scene with Corona and V-ray + fbx files. The renders for the preview were made in Corona Render 13. The model uses Corona Legacy Mtl. Corona version 1.5 or higher is required. Material conversion to V-ray was done using the V-ray scene converter. There are two models of birch trees in the scene, approximately 17.5 meters tall. Polys: 1072169 Verts: 1701804 Objects and materials in the scene have logical names. "For Corona Render, it is recommended to use a version no lower than 1.5, as the glossiness of materials is set with PBR in mind. For those working in V-ray versions lower than 3.1, please be careful. In the materials, the BRDF section has Microfacet GTR (GGX); if your version is older than 3.1, the BRDF field will be empty. Select Blinn, Phong, or Ward - whichever is preferable for you."