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What are V-Ray object properties (VROPs)?

From: Learning V-Ray for Maya: A Professional Reference Guide

Video: What are V-Ray object properties (VROPs)?

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.

What are V-Ray object properties (VROPs)?

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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This video is part of

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  1. 2m 1s
    1. Welcome
      2m 1s
  2. 9m 42s
    1. What is V-Ray?
      2m 50s
    2. V-Ray integration with the Maya UI
      6m 52s
  3. 1h 0m
    1. The Rectangle light
      11m 8s
    2. The Sphere light
      9m 24s
    3. The Dome light
      4m 52s
    4. V-Ray Sun and Sky
      11m 7s
    5. Using images and HDRs on lights
      8m 35s
    6. Using linear color space and the V-Ray Frame Buffer
      15m 20s
  4. 39m 58s
    1. The V-Ray material
      12m 46s
    2. The V-Ray Blend material
      6m 42s
    3. The V-Ray Light material
      6m 14s
    4. The V-Ray Car Paint material
      8m 21s
    5. V-Ray textures: Dirt for ambient occlusion and edges
      5m 55s
  5. 52m 21s
    1. What is global illumination (GI) in V-Ray?
      2m 43s
    2. Primary and secondary bounces
      5m 58s
    3. Brute force
      9m 1s
    4. Light caching
      11m 49s
    5. Irradiance mapping
      9m 50s
    6. Popular GI engine combinations
      13m 0s
  6. 30m 33s
    1. What are V-Ray object properties (VROPs)?
      2m 47s
    2. Creating VROPs
      9m 8s
    3. Extra object properties
      7m 48s
    4. Material IDs vs. object IDs
      5m 8s
    5. Setting VROP overrides with Maya layers
      5m 42s
  7. 40m 10s
    1. Creating passes and elements
      6m 23s
    2. Diffuse, reflection, and refraction
      8m 49s
    3. Lighting and GI
      4m 3s
    4. Shadows
      5m 6s
    5. Ambient occlusion
      8m 39s
    6. The Multi Matte render element
      7m 10s
  8. 57m 0s
    1. Cameras
      8m 32s
    2. Using the V-Ray Frame Buffer and history
      10m 22s
    3. General V-Ray render settings
      8m 57s
    4. Sampling settings
      12m 1s
    5. Color mapping
      6m 0s
    6. Surface subdivision rendering
      3m 43s
    7. Back to beauty: Assembling the render
      7m 25s

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