2011
Table Of Contents
- Contents
- Get Information
- The User Interface
- Tools in the Application Window
- Other Tool Locations
- Customize the Drawing Environment
- Start and Save Drawings
- Control the Drawing Views
- Change Views
- Use Viewing Tools
- Display Multiple Views in Model Space
- Organize Drawings and Layouts
- Create Single-View Drawings (Model Space)
- Create Multiple-View Drawing Layouts (Paper Space)
- Work with Sheets in a Sheet Set
- Create and Modify Objects
- Control the Properties of Objects
- Work with Object Properties
- Work with Layers
- Work with Colors
- Work with Linetypes
- Control Lineweights
- Control the Display Properties of Certain Objects
- Use Precision Tools
- Use Coordinates and Coordinate Systems (UCS)
- Use Dynamic Input
- Snap to Locations on Objects (Object Snaps)
- Restrict Cursor Movement
- Combine or Offset Points and Coordinates
- Specify Distances
- Extract Geometric Information from Objects
- Use a Calculator
- Draw Geometric Objects
- Change Existing Objects
- Add Constraints to Geometry
- Control the Properties of Objects
- Define and Reference Blocks
- Work with Blocks
- Create and Modify Blocks
- Add Behaviors to Blocks (Dynamic Blocks)
- Overview of Dynamic Blocks
- Quick Start to Creating Dynamic Blocks
- Create and Edit Dynamic Blocks
- Add Constraints to Dynamic Blocks
- Add Action Parameters to Dynamic Blocks
- Work with 3D Models
- Create 3D Models
- Overview of 3D Modeling
- Create Solids and Surfaces from Lines and Curves
- Create Solids
- Create Surfaces
- Create Meshes
- Create Wireframe Models
- Add 3D Thickness to Objects
- Modify 3D Models
- Create Sections and 2D Drawings from 3D Models
- Create 3D Models
- Annotate Drawings
- Work with Annotations
- Hatches, Fills, and Wipeouts
- Notes and Labels
- Tables
- Dimensions and Tolerances
- Understand Basic Concepts of Dimensioning
- Use Dimension Styles
- Set the Scale for Dimensions
- Create Dimensions
- Modify Existing Dimensions
- Add Geometric Tolerances
- Plot and Publish Drawings
- Prepare Drawings for Plotting and Publishing
- Quick Start to Saving Settings for Plotting and Publishing
- Specify Page Setup Settings
- Overview of Page Setup Settings
- Select a Printer or Plotter for a Layout
- Select a Paper Size for a Layout
- Set the Plot Area of a Layout
- Adjust the Plot Offset of a Layout
- Set the Plot Scale for a Layout
- Set the Lineweight Scale for a Layout
- Select a Plot Style Table for a Layout
- Set Shaded Viewport and Plot Options for a Layout
- Determine the Drawing Orientation of a Layout
- Use the Layout Wizard to Specify Layout Settings
- Import PCP or PC2 Settings into a Layout
- Create and Use Named Page Setups
- Use Named Page Setups with Sheet Sets
- Plot Drawings
- Quick Start to Plotting
- Overview of Plotting
- Use a Page Setup to Specify Plot Settings
- Select a Printer or Plotter
- Specify the Area to Plot
- Set Paper Size
- Position the Drawing on the Paper
- Control How Objects Are Plotted
- Preview a Plot
- Plot Files to Other Formats
- Publish Drawings
- Prepare Drawings for Plotting and Publishing
- Share Data Between Files
- Reference Other Drawing Files
- Link and Embed Data (OLE)
- Work with Data in Other Formats
- Import Other File Formats
- Attach Files as Underlays
- Attach Raster Image Files
- Export Drawings to Other File Formats
- Use Drawings from Different Versions and Applications
- Extract Data from Drawings and Spreadsheets
- Access External Databases
- Overview of Using External Databases
- Access a Database from Within AutoCAD
- Link Database Records to Graphical Objects
- Use Labels to Display Database Information in the Drawing
- Use Queries to Filter Database Information
- Share Link and Label Templates and Queries with Other Users
- Work with Links in Files from Earlier Releases
- Manage Files with Autodesk Vault
- Collaborate with Others
- Protect and Sign Drawings
- Use the Internet for Collaboration
- Use Markups for Design Review
- Render Drawings
- Draw 2D Isometric Views
- Add Lighting to Your Model
- Materials and Textures
- Render 3D Objects for Realism
- Glossary
- Index
Photons and Sampling Radius
The intensity of global illumination is computed by the number of photons
you’ve specified. Increased numbers of photons makes global illumination
less noisy but also more blurry. When the number of photons are decreased,
global illumination is more noisy but less blurry. The greater the number of
photons, the longer the rendering time.
TIP To preview global illumination, give settings such as Photons/Sample or
Photons/Light lower values, then increase the values for the final rendering.
The sampling radius sets the size of photons. In many cases, the default photon
size (Use Radius=Off) of one-tenth the scene size gives useful results. In other
cases, the default photon size might be too large or too small.
The size of the sampling radius (Radius) determines if photons overlap. When
photons overlap, the renderer smooths them together. Increasing the radius
increases the amount of smoothing and can create more natural-looking
illumination. When photons have a small radius and don't overlap, no
smoothing occurs. Ideally, photons should overlap. To get good results, you
would want to turn on Use Radius and increase the Radius size.
Global Illumination Trace Depth
The Trace Depth controls are similar to those for calculating reflections and
refractions, but they refer to the photons used by global illumination rather
than to light rays used in ray-traced reflection and refraction.
The maximum depth limits the combination of reflection and refraction.
Reflection and refraction of a photon stops when the total number of both
equals the maximum depth. For example, if Max Depth equals 3 and Max
Reflections and Max Refractions are both set to 2, a photon can be reflected
Benefits of Indirect Illumination | 2137