Example 1: The Subdivs parameter

Example 2: The Sample size parameter

Example 3: The Scale parameter

Example 1: The Subdivs parameter

The Subdivs parameter controls the number of rays that are shot into the scene, and the "noise" quality of the light cache samples.

 

Here is a scene rendered with different settings for the Subdivs parameter, all other settings are the same.

 

Subdivs = 500
Subdivs = 1000
Subdivs = 2000

 

Example 2: The Sample size parameter

The Sample size parameter controls the size of the individual light cache samples. Smaller values produce a more detailed lighting solution, but are noisier and take more RAM. Larger values produce less detail, but take less RAM and may be faster to calculate.

 

Here is a scene rendered with different values for the Sample size parameter. All other values are the same.

 

Sample size = 0.01
Sample size = 0.02
Sample size = 0.04

 

Example 3: The Scale parameter

The World Scale check box determines whether the Sample size and Filter size parameters are in screen space, or world space.

 

In the table below, the World Scale check box is not checked so that the Screen scale is used, and the scene was rendered with different image and world sizes. The Sample size was constant for all images - the default 0.02.

 

Scene scaled down to 50%
Normal scene
Scene scaled up to 200%
Resolution 250x300
Resolution 500x600
Resolution 1000x1200

 

In the table below, the World Scale mode was used. Again, the scene is rendered at three different resolutions and scales, but with the same light cache parameters. The sample size was set to be 1/6th of the sphere radius in the scene at normal scale.

 

Scene scaled down to 50%
Normal scene
Scene scaled up to 200%
Resolution 250x300
Resolution 500x600
Resolution 1000x1200