Sizes: 420x420mm
500x500mm

Polys: 80,087
Verts: 40,972

Turbosmooth is enabled in Render Iteration - 1 mode.

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Other models: https://3dsky.org/users/r27/models 
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Those who work in V-Ray versions lower than 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 - whatever suits you best."
If the CORONA version is higher than 1.4: “For Corona render, it is recommended to set the version to at least 1.5, since the glossiness of materials is adjusted with PBR in mind.