Maya: Arnold Renderer

smallarrows.GIF

Create a simple scene with a plane for the ground and 3 spheres.

SINGLE SIDED
Arnold rendering is very slow because it is calculating reflections, refractions, shadows, and ambient attributes. In order to help speed up the rendering make everything single sided.
Select all the objects in the scene.
Choose Windows->General Editors->Attribute Spread Sheet.
Select the Render Tab.
Click the Double Sided Column.
Input 0 to turn off all selected items at once.
Select only the plane, turn off Casts Shadows.

attribute_spread_sheet

COLOR MANAGEMENT OFF
Turn OFF Color Management:
Select Windows->Settings/Preferences->Preferences
Select Color Management
Uncheck Enable Color Management
Select Save

RENDER SETTINGS
Render Settings icon upper right or middle  srender_settings  (Windows->Rendering Editors->Render Settings...)

Change Rendering Using to Arnold Renderer

Under the Common tab:
Under the Image File Output
arrow:
Choose Image format: Tiff
Change Gamma to 1.0
Uncheck Dither

Under Arnold Renderer tab:
Under Ray Depth
    
Input Reflection 1
    
Input Refraction 10

Under System tab change Bucket Size to 16, this will speed up the render for tests.


BACKGROUND COLOR FOR AMBIENT LIGHT

Render Settings icon upper right or middle  srender_settings  (Windows->Rendering Editors->Render Settings...)
Under Arnold Renderer tab:
Under Environment
Click the Map Button map_button.jpg across from Background
Select Create Sky Shader
Select a darker color.

To delete the Background effect:
Click the Map Button map_button.jpg across from Background select Disconnect


RENDER A TEST WITHOUT LIGHTS
Click on the  renderbutton.jpg  Render View button located at the top of the screen.
Also try: Arnold->Arnold RenderView, this renderer keeps updating with IPR everytime you change an attribute such as color.
Turn off the IPR: Uncheck Render->Run IPR in the Arnold Render View window. Hit the pink  Arrow button on the right to see changes.
Click the snapshot icon lower right to save.
Choose Render->Crop Region  drag a smaller area to render


LIGHT
Add a light to the scene
Create->Lights->Point Light
Use
the Move Tool button  mmove.jpg to move the light above the scene.
In the Attribute editor, under Arnold, change Decay Type to constant
Render a test.
If you want to keep the Decay Type Quadratic, change the Intensity of the light to a high number such as 20.
 


SHADERS
Arnold works much better with its own shaders for now.

hypershade   Windows->Rendering Editors->Hypershade
In the Hypershade window, click on Arnold->Shader->Surface to filter the list. (Over on the left side) Select aiStandard

Select the ground plane, right mouse over the aiStandard shader ball, select Assign Material to Selection.


GLASS   Mental Ray is a lot easier.

Make another aiStandard shader assign it to one of the spheres.
*** Select the sphere, in the Attribute Editor under Arnold, uncheck Opaque (Transparency was shut off)
Switch to the aiStandard2 tab
in the Attribute Editor.
Under Diffuse change the Weight to 0.
Under Specular change the Weight to 1, check Fresnel
Under Reflection
change the Weight to .13
Under Refraction change the Weight to 1, change IOR to .9 or 1.5 (Index of Refraction, .9 for thin glass.)
Under Refraction Transmittance and Opacity both white


USE PRESET SHADERS
Make a aiStandard
shader
Press the Presets* button select a preset you would like to try.


GET RID OF NOISE
Render Settings icon upper right or middle  srender_settings 
Under Arnold Renderer tab:
Change SSS to 5 or more