Scientist Toolbox

Collection of similar models - https://3dsky.org/collection/shared/5079947 

Two models:
1. Open;
2. Closed (filling removed, to facilitate the model).

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is adjusted taking into account PBR.

For those who work in VRay versions below 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - whichever you prefer.

The archive contains STL, FBX (V-Ray and Corona) and OBJ formats