Example 1: The Search distance parameter
Example 2: The light Caustics subdivs parameter
For this image, the Caustics subdivs parameter for the light is set to 50, so that the separate photons are more distinct; the global caustics Multiplier is 1, and the Max photons is set to 0. As can be seen, the larger search distance produces blurrier caustics.
Search dist = 0.05 Search dist = 0.5
This example is similar to the previous one, but the Caustics subdivs parameter for the light is increased to 300. The other parameters are the same as in the previous example. As can be seen, the larger number of photons produces smoother caustics effects than in the previous example.
Search dist= 1 Search dist = 5