![]() In essence, the IOR allows Blender 3D to portray an accurate representation of glass, ensuring the most realistic results possible. A proper understanding allows designers to simulate realistic light behavior accurately, contributing to the overall believability of a scene. When creating glass materials in Blender 3D, understanding the IOR can make a world of difference. Learn new skills for next to nothing on Skillshare!ĭecoding The Importance Of IOR In Blender? Such small variations can have noticeable impacts on the final render, hence the importance of knowing the correct IOR for the specific type of glass you aim to portray. For instance, Crown Glass generally possesses an IOR of around 1.52, while Flint Glass has an IOR closer to 1.62, but even this can very depending on how its made. However, it’s worth noting that the IOR can slightly vary based on the specific type of glass being simulated. This standard has been widely accepted in 3D modeling communities as it provides a convincing depiction of glass under most light conditions. The general IOR value for glass is typically around 1.5. This process is not perfect and does not create identical results each time because of the variety of the composition in the glass. This is because most glass is created using various components and temperatures to create the variety of glass objects used in everyday life. What we have found is that there is no exact value to a specific type of glass, but a very small range of values that can be used. We have also researched multiple sources as some sources suggest different values to others. Note: We have conducted our own research into what the typical values are for commonly used types of glass, performing tests with glass objects in Blender itself and comparing them to real-world counterparts. IOR Values Of The Different Types Of Glass? So we have a rough idea of the values that we can use to acquire the correct behavior of a glass material but need to go into a bit more detail on what the actual values are for each of the different types of glass, and also why you should bother with the index of refraction in the first place. Each type of glass has a different structure and therefore a different IOR value assigned to it. The index of refraction for glass ranges from as low as 1.44 to as high as 1.95, as glass is created in various ways to be used with different applications such as windows, glass bottles, and safety glass. A common question is finding the specific IOR value with a material like glass. These properties can include diffusing, refraction, and subsurface scattering depending on the material. Materials have a variety of properties to influence how the material is going to respond when hit by a source of light.
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