Surface like a diamond

Hello everyone and thank you for accepting me into your forum. I would like to create the project of a watch glass with the internal surface prismatic like a diamond. I’m not very expert in 3D graphics so I wanted to ask you for some suggestions. I would like to attach the file I created but as a new user I am not allowed.

Thanks in advance

Like a “Fresnel lens” like your car’s tail light is textured inside not outside?

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Hi Oregonerd,
thanks for your answer, exactly, I would like to create internal prisms as if it were the surface of a diamond.

A repeating geometric pattern. Diamond shaped. You could create one and use the pattern tool and then add/ subtract that to the lens. To make a diamond shape simply draw a diamond sketch, extrude it then use the scale tool and scale the top surface of the extruded diamond down to 0.01 Shapr3D Webviewer

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