Mirror Diamond Cattelan Italia 100x160cm.
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Corona(2) -2015. Vray(3.6) -2018.
– 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.
– Who works in V-Ray versions 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.
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https://www.cattelanitalia.com/en/products/6C8C745C-D9BA-4FAC-AAA7-96DA50553ED9?c=28 
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Mirror collection: https://3dsky.org/collection/shared/5237326 
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