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maya_arnold_CM_vs_RAW
Default Color Management settings                         RAW Color Management Settings

Maya Arnold RAW Format
Rendering RAW for more dynamic range, better color, highlights and shadows.


Color Management Settings

Select
Windows->Settings/Preferences->Preferences
    
Select Categories Color Management

Check Enable Color Management (default)

Under Color Transform Preferences
     Change View: to Raw   (default ACE 1.0 SDR-video)


Set Color Space Rules
Under Rule Priority
     Select Default

     change
Input Color Space
: to Utility->Raw   (default sRGB)

     Click Reapply Rules to Scene button
     (This will change all your default Base Color textures maps to RAW format.)

Under
Output Color Transform Preferences
     Check check_box
Apply Output Transform to Renderer
  (important for batch rendering later)



Arnold Render and Light Tutorial
maya_arnold_CM_vs_RAW_tutorial
Default Color Management settings                         RAW Color Management Settings

Create a Scene
Create->NURBS Primitives->Cylinder->option
     Select Caps:  Both

In the Channel Box
     Translate Y   1.001

Create->NURBS Primitives->Sphere
In the Channel Box
     Translate X  2.5
     Translate Y  1

Create->NURBS Primitives->Plane

In the Channel Box
    Scale X and Z  20



Add a StandardSurface Shader
Select the Plane

Use the right mouse key over the plane to bring up the marking menu
     Select Assign Favorite Material->StandardSurface

(You should see the shader in the attribute editor on the right, switch the tab if you don't.)
Click the Map Button across from Base Color map_button.jpg  
     Add a Checker texture
Under the texture's Attributes
     Change Color 1 to value 0.4
     Change Color 2 to value 0.3
Under the place2dTexturetab
     Change Repeat UV to 16 (both)

Hit 6 to see the texture



Arnold AiStandardSurface Shader
hypershade Hypershade
Select the
Materials tab
     Select Arnold and Shader selection filters
          Click on the aiStandardSurface icon to create a new shader ball
hypershade_arnold_shader
Select the sphere and cylinder
     Hold right mouse over the aiStandardSurface material
     Click Assign Material to Selection

Try a Preset
Click on Presets*
     Choose a shader from the list such as Copper and Replace

You can change the aiStandard shader to a Maya Standard Surface shader.
This way you can see a swatch of the shader ball in the Hypershade Window.
     Hold down the button next to Type
          Select Standard Surface Shader



Arnold Skydome Light
Arnold->Lights->Skydome Light


In the Attribute Editor
     Change
Samples to 2   (default 1, less grainy)
     Uncheck Cast Volumetric Shadow
(This will help speed up the render a bit. Volumetric is for rendering smoke, particles, fog etc.)

     Change Camera
to 0  (This turns off the camera in the background, default 1)



Arnold Area Light
Arnold->Lights->Area Light

In the Channel Box
     Translate X  -10, Y  15,  Z  10
     Rotate X -45,  Y -45   (There is a pointer on the light icon, this needs to aim at your objects.)
     Scale X .2, Y .2, Z .2    (This will give you sharper shadows.)

In the Attribute Editor 
    Change Exposure to 10

     Set Soft Edge to 1 to improve the edge quality of the shadow.     (default 0)
     Set Spread lower, the cone of light becomes smaller and brighter.  (default 1)
     Change Samples to 2   (default 1, less grainy)
     Change Shadow Color to a dark gray



Render Settings
Render Settings icon upper right  srender_settings  (Windows->Rendering Editors->Render Settings...)

Change Render Using to Arnold Renderer    (Arnold is the default)
Presets-> Import Render Settings->Default Settings   (This resets all settings)
Under the Common
tab:
     Choose Image format: tif  (default exr, too huge, 32 bit per channel, ignores color mgt.)
     Uncheck Dither
     Frame.Animation ext:    name.ext   (name.#.ext for an animation)

Quality settings for Sharpness and less grain
(3 times slower to render.)

Under the Arnold Renderer tab:
Under the Sampling arrow:
     Set Camera (AA) to 6      (default 3)
     Set Diffuse to 2      (default 2)
     Set Specular to 2      (default 2)
     Set Transmission to 0      (default 2, use if you are using transmission in your shader)
     Set SSS to 0      (default 2, use if you are using Subsurface in your shader)
     Set Volume Indirect to 0      (default 2, use for smoke and volume effects)

Under Filter
     Change Width to 1   (less blurry, more grainy, default 2)

Under the Ray Depth arrow
     Set Total to 2      (should match highest setting below, default 10)
     Set Diffuse to 1      (default 1)
     Set Specular to 2      (default 1, nicer reflection)
     Set Transmission to 0      (default 8)
     Set Volume to 0      (default 0)
     Set Transparency Depth to 0  (setting for no transparency, 4 good transparency value, default 10)



Render an image to the Render View
Click the Render View icon upper right render_view to open the window
Click the Start IPR icon  arnold_render_arrow



Render to Arnold Render View
Arnold->Render

Notice the Arnold RenderView seems sharper than the Maya RenderView window. The final renders are the same.



Render to a File
render_module
Switch to the Rendering Module
Select Render->Render Sequence


The image is stored locally on your computer or in your external drive project in the images folder.

Local PC: C:\Users\%USERNAME%\Documents\maya\projects\default\images

Local Mac: /users/$user/Documents/maya/projects/default/images



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.
attribute_spread_sheet



If you do not see Arnold options
Install plug-in
Keep in mind that Autodesk did not develop Arnold; it is a plug-in for Maya, so you may have to enable it in the Plug-in Manager before you can see it as an option in your Render Settings window.
     To enable the plug-in:  Windows->Settings/Preferences->Plug-in Manager
    
Check both the Loaded box and the Auto Load box next to mtoa.mll
     (Located near the bottom of the list.)


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© 1988-2022 34 years Jennifer Steinkamp