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Global Illumination |
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Global Illumination |
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Shaderlight uses a new Global Illumination technique, Active Photon Tracing. This technique allows us to make changes to light properties and update the indirect illumination accordingly. In future releases, this will extend to updating the indirect illumination as a result of changes to material properties.
By building in the capability to make changes, Active Photon Tracing will take longer to render the initial GI scene than comparable techniques such as Photon Mapping and Final Gather, but you will save time as you manipulate lighting levels to perfect the global illumination.
| • | Enable – Turns on GI. GI must be enabled before exporting the scene. Once a scene has been exported, enabling or disabling GI will have no effect on the rendered image. |
| • | Interactive GI – With this option selected it becomes possible to change the intensity and color of lights and have the indirect illumination update automatically. Using this option will use more memory and slow down the rate of updates, but it is still significantly faster than re-rendering the scene. Once a scene has been exported, enabling or disabling Interactive GI will have no effect on the rendered image. |
| • | Photons – Controls the total number of Active Photons traced into the scene and therefore the accuracy of the GI render. The photons are automatically distributed across the light sources in the scene according to their overall contribution to the scene lighting. |
| • | Samples – Controls the smoothness of the GI render. Low sample levels will speed the GI render but can cause “banding” artifacts. |
| • | Subsampling – Controls the accuracy of the GI render. A value of 1 is the highest accuracy. Increasing the value will speed up the GI render, but the accuracy of the indirect illumination will decrease in areas of fine detail. |
Page url: https://artvps.com/media/onlinehelp/index.html?globalillumination.htm
