The Radiosity Window
From ShadeCamp
The Radiosity window allows you to set options for Radiosity, start the calculation, and display the resulting image. Open the Radiosity window by choosing View > Radiosity.
Radiosity Options
Show/Hide Button
This button is used to show/hide Radiosity options enabling you to specify various settings related to Radiosity.
Radiosity Options
These options enable you to specify various Radiosity settings. Use the tabs in the window to view the items you want to set.
Exposure Tab (Shade 9 Professional)
Clicking this tab opens the Exposure settings.
Display Tab
Clicking this tab opens the Display settings.
Display Settings
You can use these settings to specify how the result of the Radiosity calculation is displayed in the Radiosity window. Changes to settings in this dialog will immediately affect the display of the Radiosity window, except for some display options regardingthe Radiosity calculation.
Mesh Checkbox
If this checkbox is on, the wireframe mesh is drawn. This display allows you to see how the surface is subdivided.
Solid Checkbox
If this checkbox is on, the objects are displayed with solid surfaces. This is a typical Radiosity display.
Cull-face Checkbox
If this checkbox is on, the back surfaces of objects will not be displayed. This is particularly useful for viewing objects in the mesh display mode.
Blend Checkbox
If this checkbox is on, objects whose surfaces are transparent will appear transparent.
Radiator Checkbox
If this checkbox is on, light sources and/or areas that radiate light are drawn in red wireframe.
Update Every Text Box
This specifies how the light sources and/or areas that radiate light are drawn in red wireframe during the radiation calculation. Enter a value in the text box, which indicates after how many calculations the wireframe will be updated.
Solution Tab
Click this tab to open the Solution settings, enabling you to specify settings related to the Radiosity calculation.
Solution Settings
You can set various options for the Radiosity calculation. The Radiosity solution must be recalculated after changing any settings
Convergence Text Box
This is the ratio of the unprocessed portion of the Radiosity calculation to the entire calculation process.
Diffuse Text Box
The value entered in this text box is mulNotelied by the value of the Diffuse parameter in the Surface window to perform the calculation, and the result is displayed in the Radiosity window. This value will significantly affect the indirect light.
Mesh Spacing
Using the Mesh Spacing text boxes, you can set the calculation precision for mesh spacing, i.e. mesh resolution of a surface that receives light.
The mesh subdivision is automatically performed based on the magnitude of energy residing at the vertices of polygons. The Initial Mesh Spacing and Minimum Mesh Spacing are the values with which the automatic mesh subdivision is initiated and terminated, respectively.
Initial Mesh Spacing Text Box
Enter the maximum value with which the mesh subdivision starts. The units specified in the Units popup menu in the Figure menu apply to this value.
Minimum Mesh Spacing Text Box
Enter the minimum value at which the mesh subdivision terminates. The units specified in the Units popup menu in the Figure menu apply to this value.
Mesh Subdivision Sensitivity
In connection with the text boxes in the Mesh Spacing group, you can use the text boxes in this group box to set the calculation precision for mesh spacing, i.e. mesh resolution for surfaces that receive light.
These text boxes control how the automatic mesh subdivision is performed in terms of indirect and direct radiation.
Direct Radiation Text Box
This parameter controls the automatic mesh subdivision used in calculating the direct radiation. With a higher sensitivity value, meshes are automatically subdivided for even small differences in the amount of energy received by adjacent mesh vertices.
Indirect Radiation Text Box
This parameter controls the automatic mesh subdivision used in calculating the indirect radiation. When a higher sensitivity (a higher value) is used, a proper mesh subdivision will be performed even if the difference in the amount of energy at mesh vertices is small.
Source Subdivision Sensitivity Pull-down Menu
This popup menu provides the options to correctly render surfaces that emit light.
These surfaces, like the surfaces that receive light, will be automatically subdivided based on the differences in the amount of energy at the mesh vertices.
Skylight Accuracy Pull-down Menu
This popup menu provides the options to correctly render shadows produced by skylight.
Skylight is modeled by equally dividing the sky sphere both latitudinally and longitudinally, and using parallel light from each subdivision.
The accuracy of the skylight calculation depends on the number of subdivisions of the sphere. When the intensity of sunlight or an Infinite Distance Light Source is very low, rendering of the shadows generated by skylight may be imprecise.
Number of Threads Pull-down Menu
This pull-down menu sets the number of threads used for the Radiosity calculation.
Note: Multi-threading is only available in Shade 9 professional.
Shadow Leak Reduction Checkbox
When this checkbox is switched on, shadow leaks are automatically checked for, to prevent them from occurring. However, you may not get the expected results, depending on how the objects were created. Please try to create the objects so as to avoid shadow leaks. For details about shadow leak correction, refer to Chapter 16: Radiosity in the User Guide.
Auto Update Checkbox
This checkbox is available only in Radiosity Pro provided in Shade professional. If this checkbox is on when an operation adapted for updating is performed, the Radiosity window is automatically updated.
Start Button
Click the Start button to perform the Radiosity calculation.
Once the calculation starts, the Start button is disabled and the Stop and Abort buttons are enabled. During the calculation, the only operation you can perform is to click the Stop or Abort button.
Stop Button
Click the Stop button to terminate the calculation.
Once the calculation stops, the Stop and Abort buttons are disabled and the Start and Resume buttons are enabled.
When you click the Start button, the result of the current calculation is discarded and a new Radiosity calculation starts. On the other hand, if you click the Resume button, the current calculation resumes from where it was stopped. When you click the Stop button, there may be a delay until the calculation actually stops, because this action requires some preparation in order to be able to resume.
Abort Button
Click the Abort button to terminate the calculation completely. Once the calculation has terminated, the Stop and Abort buttons are disabled and the Start button is enabled. Unlike the Stop button, clicking the Abort button cancels all the remaining calculation tasks and performs no preparation for resumption, reducing the time before the calculation stops.
Resume Button
Clicking the Resume button restarts a Radiosity calculation that was suspended by clicking the Stop button.
Update Button
This button is available only in Radiosity Pro provided in Shade professional.
Clicking this button enables you to see the results of changes to the radiated energy and the distribution characteristic for a light, after performing a radiosity calculation. This allows you to adjust light intensity and color balance, and see the results quickly, withouthaving to calculate all the data over again.
Clear Button
Clicking the Clear button stops the Radiosity calculation and at the same time releases memory allocated for the calculation. The contents of the Radiosity window will be lost. This button is useful when a low memory condition is encountered during a Radiosity calculation.
The result of the Radiosity calculation (if any) will be cleared.
Convergence
The progress of the Radiosity calculation is shown as a percentage value.
Auto Exposure Checkbox
You can set auto exposure correction for the Radiosity calculation result to on or off.
The checkbox is switched on by default. For details about auto exposure correction, refer to the User’s Guide, Chapter 16, “Automatic Adjustment of the Radiosity Calculation Intensity.” |
