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Different samples distributions can be used to create different occlusion effects.
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | distribution |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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| Description |
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| Uniform | Rays are not weighted in any particular direction in the hemisphere above the shading point. |
| Cosine | Cosine distribution is a commonly used to render ambient occlusion. |
| Reflection | Generate samples based on the the reflection lobe of the assigned material. Materials with only a diffuse BRDF will have a result similar to the cosine setting above. |
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Sample spread of rays when using cosine distribution. A value of 1.0 gives a perfect Lambertian distribution.
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| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | cosinespread |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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|
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Max Distance
As each point is shaded, rays reach into the scene to strike nearby objects. In some cases, like an interior, this may produce a dark or black result. You can reduce that distance using this control. Note this is measured in scene units. The default is 0 or infinite.
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| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | maxdistance |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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|
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Falloff
Falloff can be used to control the softness of the occlusion effect.
Without Max Distance, falloff is calculated as an exponential falloff. Values are scene dependent with larger values creating a softer look.
| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10. |
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| jpg, pxrDome_intensity20.jpg | | maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | falloff |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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|
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When combined with Max Distance, falloff is calculated as a normalized power function.
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| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | falloffmaxdistance |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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|
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Use Albedo
When on, this setting applies the diffuse color to the resulting image. This may be a simple color or pattern attached to the material.
| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
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| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | usealbedo |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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albedo enabledNum Samples
This option generates fixed samples at each shaded point. More samples may help resolve noise in fewer camera samples, but may reduce performance at higher numbers.
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| Carousel Image Slider |
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| include | pxrDome_intensity05.jpg, pxrDome_intensity10.jpg, pxrDome_intensity20.jpg |
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| maxNumber | 3 |
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| dots | false |
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| columns | 3 |
|---|
| infinite | false |
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| sliderHeight | 190 |
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| arrows | false |
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| labelsFilter | numsamples |
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| gutterSize | 20 |
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| title | Intensity |
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| animate | false |
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| captions | true |
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num samples = 1 | num samples = 16
