Choose an appropriate index in the drag down option: 0 for the highest priority and 5 for the lowest priority.In this window, switch the “default” option to “fixed” option.Click on “Dielectrics Priority Control” option.Right click on the body/component and call the context menu.Find the bodies/components that you want to set the priority.Follow the steps below the set up the dielectrics priority: The dielectrics priority control option will only show in the context menu under Render Workspace. The ice cubes and bubbles are not seen in the drink anymore. Glass = 1, icecubes and bubbles = 2, liquid = 0 Note that both bubbles and ice cubes are inside the liquid and you want them to be visible, so they have a lower number than the liquid. Glass = 1, icecubes and bubbles = 2, liquid = 3 In the above example, the priorities are set as follows: What happens if you set the wrong priorities? The third priority is for the drink in the glass, 3.
![brighter 3d transparent glass brighter 3d transparent glass](https://fearlessrevolution.com/download/file.php?avatar=57978_1605220758.png)
The second priorities are for the ice cubes and bubbles, 2. In the example below, glass has the highest priority (winner), so it has the smallest number, 1. When deciding the numbers, in the area where the geometry overlaps, the geometry that you want rendered should have a lower number and the one that you don’t want rendered should have a higher number. At render time, wherever multiple geometries overlap, the shader for the model with lowest number contributes. Then you set up priorities on the different models. With this approach, you model the liquid and glass as overlapping geometry as shown in Fig 4. Most renderers like Arnold, Maxwell, RenderMan and Houdini have this feature. This is the simplest to model, but the drink will appear to be inside the glass interior. The last method is to model the liquid and glass as overlapping volumes (Fig 4).
![brighter 3d transparent glass brighter 3d transparent glass](https://aws1.discourse-cdn.com/sketchup/original/3X/8/7/8794d987a39cd78f5c69a2293b8f9f841d554d4b.png)
Some renderers like Mitsuba, Keyshot, LuxRender use this approach, but it will not work in Fusion since models are also used for prototyping and building products, so splitting up the surfaces is not a good idea. Instead of thinking of the model as a single object, you break it down and model the actual “interface” between the surfaces.
![brighter 3d transparent glass brighter 3d transparent glass](https://image.shutterstock.com/image-illustration/3d-rendering-abstract-plastic-bag-600w-1293748600.jpg)
The third method is to model interfaces (Fig 3). The refractions will look somewhat plausible but compared to a correct render, they are visibly wrong. All renders can handle this method but it will not produce correct results. The second method is to have a slight air gap between the volumes (Fig 2). This approach is also very tedious, especially if you have a complex shape like a perfume bottle for instance. However, rendering coincident surfaces can be incorrect due to modeling precision errors. The first method is to model such that the volumes of different geometries don’t overlap, but instead are coincident (Fig 1). There are at least four different ways in which this can be modeled: The reason you should care about nested dielectrics is it is a difficult problem to render situations like this, especially when you look at semi-transparent dielectrics.įor example, if you’re modeling a drink in a glass with ice cubes, air bubbles and water droplets on the surface of the glass, and you want an accurate rendering, your rendering engine needs to be able to account for different Index of Refraction values for all the models – the glass, drink, air bubbles and ice cubes.
![brighter 3d transparent glass brighter 3d transparent glass](https://static.wixstatic.com/media/99a798_ee3ce73043a841999cf3f92fed79dbd9~mv2_d_2500_1500_s_2.png)
Nested dielectrics, in turn, refers to non-metallic objects modeled within other non-metallic objects. You’re probably asking yourself, “What are nested dielectrics, and why should I care?”įirst, dielectrics are materials that do not conduct electricity which pretty much means all materials besides metals.