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In this video we'll be taking a look at what VRay object properties mean for your scene. Here we have a car rendered out, and it has multiple VRay object properties in different parts of the car. One of the good things about a VRay object property is the ability to give you different object IDs easily that allow you to separate parts of the car for easier compositing. Here we've created different object IDs based on the different shaders that are attached to the car. For example, we have green for the glass, with red for the car body paint. Blue for the chrome alloy wheels, and green for the chrome trim. This allows us to easily use the matting in composite to change the characteristics of the render.
But object properties are more than just allowing you to have object IDs for your geometry. You can have object IDs for groups of objects that allow you to turn on and off various render properties, such as whether a set of objects will generate or receive GI. Whether those objects are visible in the scene or in reflections or in refractions, whether or not they cast shadows. You can create them as matte surfaces, which will make those objects render black with even a negative one or a negative black alpha contribution, allowing you, again, a greater flexibility in composite.
All of these settings work with my render layers, so you can set overrides quite easily. You can set up object properties on a per object basis, or in groups of objects as you see here. We've created an object property here for all the roof elements that we need to control. (BLANK_AUDIO). With these object properties we've created setups for different object ID's to allow us to control the background separately.
In this video, we took a look at what object properties are in VRay, and we'll be taking a look at what they can do in coming videos.
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