![]() Since glass is a highly reflective and refractive material, it is recommended to trace the respective rays further than default. So, let's set the IOR of this material to 1.517. Air has IOR of 1 by definition, which means it is no obstacle for light transmission. The IOR stands for how the material refracts the transmitted light. Standard glass has Index of Refraction(IOR) 1 of 1.51714. To break the "perfection", let's reduce the Reflection Glossiness to about 0.95 and the Refraction Glossiness to 0.99. In the real world no glass material is fully reflective or fully refractive, and the same goes for glossiness. The white color indicates that this material is fully refractive. To make the material transparent, set the Refract option very close to white. This way, we make the material reflective. Then, increase the Reflect option by changing it to something like mid-gray or a bit lighter. This eliminates the color from the material. To achieve that here, let's set the Diffuse color to black. By default, it does not have diffuse color. In the real world, glass is usually transparent and somewhat glossy. Let's start by creating a VRayMtl material. ![]()
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