Preparation for This Tutorial

• If you have not already downloaded the tutorial files (MAX scenes and other assets), download them now and unzip them into a project folder called \Autodesk 3ds Max 2012 tutorials. See Where to Find Tutorial Files.
• On the Quick Access toolbar, click (Project Folder) and set your current project to Autodesk 3ds Max 2012 Tutorials.
  

Use the Quicksilver Renderer for Fast Results and Stylized Images

Set up the scene:

• On the Quick Access toolbar, click (Open File), navigate to the \scenes\rendering\renderers folder, and open barcelona_chair.max.
  NoteIf a dialog asks whether you want to use the scene’s Gamma And LUT settings, accept the scene Gamma settings, and click OK. If a dialog asks whether to use the scene’s units, accept the scene units, and click OK.

  The scene shows a living room with windows and a chair in it. A painting is on the wall.

  

Use the Quicksilver renderer to render the scene:

1. On the main toolbar, click (Render Setup).
2. On the Render Setup dialog Common tab, scroll down to the Assign Renderer rollout. Open the rollout if it isn't already open.
3. On the Assign Renderer rollout, click the (Choose Renderer) button to the right of the Production label.
   

   The Production renderer is the one used to render finished output.

   3ds Max opens the Choose Renderer dialog.

4. On the Choose Renderer dialog, click to select Quicksilver Hardware Renderer from the list, and then click OK.
   
5. On the Render Setup dialog, click Render.

   3ds Max uses the Quicksilver renderer to render the scene.

   

   The Quicksilver renderer uses your system's CPU to prepare scene data for rendering. It uses the graphics card (Graphics Processing Unit, or GPU) to perform the actual rendering. The first time you render a scene, the CPU needs to compile the shaders used in the rendering. This can take some time, but it needs to happen only once per shader: Subsequent renderings are faster than the first rendering. For example, on one system this scene takes about 1 minute, 45 seconds to render the first time, but subsequent renderings take less than 30 seconds.

   The Quicksilver hardware renderer supports a limited set of materials and maps or shaders. For details, see Quicksilver Hardware Renderer.

   To render scenes quickly, the Quicksilver renderer simplifies shadows and some other scene details. This will be apparent when you compare the Quicksilver rendering with an iray rendering of the same scene, later in this lesson.

Try one of the Quicksilver renderer's non-photorealistic styles:

1. On the Render Setup dialog, go to the Renderer tab.
2. In the Visual Style & Appearance rollout Visual Style group, click to open the Rendering Level drop-down list, then click to choose Graphite from that list.
   
3. On the Render Setup dialog, click Render once again.

   3ds Max renders the scene again, this time in the style of a pencil sketch.

   

   You might want to experiment by rendering the chair using other non-photorealistic styles.

Use the iray Renderer for Physical Accuracy

The iray renderer generates images by tracing light paths. It is especially good at rendering reflections, including glossy reflections as in this scene, and self-illuminating objects. Like the Quicksilver renderer, it supports a limited set of materials and maps or shaders. For details, see iray Renderer. As long as your scene uses physically based materials, such as Autodesk Materials, and photometric lighting, the iray renderer creates physically accurate results.

The iray renderer does not require any particular graphics card, and can run on the Central Processing Unit alone. However, a graphics card with a CUDA-enabled Graphics Processing Unit (GPU) improves the performance of the iray renderer without changing the result (CUDA stands for Compute Unified Device Architecture).

Set up the scene:

• Continue from the previous section. If you had to skip the previous section, then on the Quick Access toolbar, click (Open File), navigate to the \scenes\rendering\renderers folder, and open barcelona_chair.max.
  NoteIf a dialog asks whether you want to use the scene’s Gamma And LUT settings, accept the scene Gamma settings, and click OK. If a dialog asks whether to use the scene’s units, accept the scene units, and click OK.

Create an iray rendering:

1. If the Render Setup dialog is not already open, then on the main toolbar, click (Render Setup).
2. On the Common tab Assign Renderer rollout, click the (Choose Renderer) button to the right of the Production label.
   

   3ds Max opens the Choose Renderer dialog.

3. On the Choose Renderer dialog, click to select "iray Renderer" from the list, and then click OK.
   
4. On the Render Setup dialog, go to the Renderer tab. On the iray rollout, choose Iterations (Number Of Passes).
   

   The main iray renderer controls simply set the duration of rendering: You can choose to set the time in hours, minutes, and seconds; to specify the number of iterations; or to set an Unlimited rendering. The Unlimited option is good for overnight rendering.

   If you leave the value of Iterations set to its default of 500, rendering this scene takes about 1 hour (as tested on a dual-processor 64-bit system running at 2.5GHz, but with no graphics-card acceleration). If you like, you can reduce the number of iterations to reduce the rendering time.

5. On the Render Setup dialog, click Render.

   3ds Max uses the iray renderer to render the scene.

   The first iteration is dark and grainy.

   

   Each iteration adds detail and reduces the graininess. After several iterations, the scene begins to become clear.

   

   Here is the result after the full 500 passes:

   

   Compared to the Quicksilver rendering in Realistic mode, the lighting and shadows are much subtler, and the curtains and their shadows show fine details that were not apparent before. Lighting and reflections on the painting are subtler, too.

   There is still some graininess in the darker shadows: An Unlimited rendering would correct that.

   

   Overnight is a convenient way to run the Unlimited option, though for this model, it doesn't take as long as that to eliminate the graininess in the shadows.

Save your work:

• Save the scene as my_chair_rendered.max.