(64 Secondary Samples / 64 Primary Samples = 1 Secondary Sample). So instead of the 64 Samples for the light and material each as you might expect, this gets divided by the AA Max of 64 Samples (8 Subdivs), which results in only 1 Secondary Sample being taken for the Lights, GI, and Materials each. Well it's important to note that even though the Lights, GI, and Materials are set to 64 Samples (8 Subdivs) each - V-Ray internally divides this value by the AA Max Samples value of your scene. "Wait, only 1 Secondary Sample for the Lights, GI, and Materials each? Shouldn't it be 64 Samples (8 Subdivs) as we've set them?" BUT for each of those Primary Samples you take, you're only allowed to take 1 additional Secondary Sample to figure out what's going on for each Light, GI, and Material." "I'm allowing you to use up to 64 (8 Subdivs) Primary Samples (AA) per pixel to figure out what's going on in this scene and reduce the noise as close as you can to my specified noise threshold. Through the render settings, you're telling V-Ray: Now lets go over exactly what's happening in this baseline render.
VRAY RHINO CHANGE IMAGE QUALITU HOW TO
In this tutorial we'll learn how to best utilize these Primary and Secondary Samples to get the highest quality render (lowest amounts of Noise) in the fastest amount of time. So Subdivs 2 = Samples.įor example: 8 Subdivs = 64 Samples.
![vray rhino change image qualitu vray rhino change image qualitu](https://static.food4rhino.com/s3fs-public/styles/large/public/users-files/chaos-group/app/rhino-480px_09.jpg)
The square root of the actual number of Samples. The samples controlled by V-Ray's DMC Sampler, which is specialized in sampling a scene's Lighting, Global Illumination (GI), Shadows, Material Reflection & Refraction, and Sub-Surface Scattering (SSS). The samples controlled by V-Ray's Image Sampler (also known as Anti-Aliasing or AA), which is specialized in sampling a scene's Geometry, Textures, Depth of Field, and Motion Blur.
![vray rhino change image qualitu vray rhino change image qualitu](https://docs.chaos.com/download/attachments/64595649/Rhino_VRay5_RenderParameters_Quality.png)
( Noise Threshold is named Adaptive Threshold in V-Ray for Maya) The amount of Secondary Samples sent out into the scene is mainly controlled by the Subdivs settings from individual Lights / Global Illumination / Materials in the scene, and the Noise Threshold setting of the DMC Sampler. The amount of Primary Samples sent out into the scene is mainly controlled by the Min Subdivs, Max Subdivs, and Color Threshold settings of the Image Sampler. So in order to reduce noise, you need to provide V-Ray with more information - and to provide V-Ray with more information, you need to take more samples. Noise present in a render means that V-Ray wasn't able to gather enough information about what's going on in a scene. This is because Noise is caused by a lack of information. The more a scene gets sampled, the more information V-Ray is able to gather about the scene, and the higher quality the resulting render will be - which means less Noise in the render. In order to accurately figure out what's going on in a scene, many Primary and Secondary Samples are needed to be taken. If you already know the underlying concepts and just want the technical step-by-step procedure, click here to skip right to it.įrom this point forward, we'll simply refer to 'Rays' as 'Samples' - because that's what the purpose of a Ray is - to take a Sample of a scene to gather information about what's going on in it. And finally I'll provide a step-by-step procedure to optimize any scene to render with an ideal balance of quality and speed. Then we'll learn how to identify the different sources of noise a scene can have. Then we'll go over an example scene to demonstrate exactly how a render can be optimized to be faster and cleaner. We'll first cover some of the underlying concepts behind how ray tracing and V-Ray's sampling works. But with a bit of understanding of how V-Ray works under the hood, you can achieve a higher quality result WITH faster render times - in some extreme cases ranging between 3x faster to 13x faster than the universal settings. Many times you'll see artists adopt the 'Universal V-Ray Settings' of having the Image Sampler (Anti-Aliasing, or AA) Max Subdivs value set very high (like 50 or 100), and then simply lowering the noise threshold value until the render becomes clean enough - thinking that it's the best / fastest that V-Ray can do. There's often a lot of confusion surrounding V-Ray's sampling methods and what 'ideal' settings are.
![vray rhino change image qualitu vray rhino change image qualitu](https://vfxsoftwaredirect.com/pub/media/catalog/product/cache/a60f3a6c87b3aa8cfe74d68a8c0ed834/v/r/vray-5-rhino.jpg)
This tutorial attempts to cover the process of optimizing your V-Ray render settings to get the best possible render quality and fastest render time for a given scene.