It turns out that Maya Arnold can also render high-quality works!Awesome Tips

Arnold is Autodesk a ray-tracing rendering program for computing computer-generated 3D scenes, and in recent years has become the most widely used in professional filmmaking worldwideOne of the rendering programs.Over 300 leading studios and production companies use Arnold as their standard renderer.

Autodesk Arnold is part of Autodesk Maya and Autodesk 3ds Max as an interactive renderer.Starting with version 6, Arnold is able to use both CPU and GPU for rendering.Plug-ins are available for the following programs: Maya, 3ds Max, Houdini, Cinema 4D, Katana, and Softimage.

In today's article, let's look at some tips for improving rendering quality with Arnold for Maya.

Sampling

If ray tracing is the process of taking rays from a virtual camera and reflecting them off of geometry to produce a per-pixel color, then a sample is the number of rays emitted into the scene.The process of controlling the amount of light each pixel emits to determine the color of each pixel is called sampling.

The amount of light that hits the scene has a direct impact on both the quality of the rendered image and the total time it takes to render that image.

Arnold Sampling Settings

This is where we can find sampling settings that control the number of rays needed to reduce noise and produce high quality renders.To change Arnold's sampling parameters, navigate to Windows>Rendering Editors>Render Settings.In the Render Settings window, set the drop-down menu Render Using: Arnold Renderer .

You can now see the Arnold Renderer tab with the Sampling rollout.Various sampling methods for various aspects of rendering can be found under the Sampling rollout.

• Camera (AA) – Controls overall image quality.This includes anti-aliasing, edge quality (jaggy edges), motion blur, and depth-of-field noise correction.

Sampling Settings: Diffuse, Specular and Transmission sampling handles indirect subsampling.They deal with how objects in the scene reflect light from each other.

• Diffuse - Controls the rendering noise for indirect reflected light on diffuse areas of the scene.

• Specular (glossy) – Controls the rendering noise of specular highlights caused by indirect reflected light.

• Transmission (refraction) - This setting controls the rendering noise on perspective objects in the scene, as seen through transparent objects such as glass windows.

Using AOVs

Isolate parts of an image using AOVs to determine which part of the render is causing the noise.AOVs is short for Arbitrary Output Variables.This is just Arnold's term for render passes.To use AOVs:

• Render Editor>Render Setup (Windows)
• Navigate to the AOV tab.
• Navigate to the AOV browser rollout.
• Select from the AOV Group column.
• The Available AOV column will be populated with AOVs for you to choose from.
• Select AOV.In most cases, use the AOVs listed below:
  – Direct Diffuse – For surface noise caused by direct lighting
  – Indirect Specular– for specular light noise in specular highlights
• Noise propagation in transparent surfaces
• To move these AOVs, use the arrows.

Direct lighting and shadow noise

As Sampling in the Sampling rollout cleans up indirect lighting (Diffuse Indirect, Specular Indirect), adjusting these settings has no effect on direct diffuse, direct specular, or shadow noise.Use Light Samples to increase the number of samples for direct lighting.To do this, open the light's property editor and change the Samples setting.

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