Page History
This page provides information on the Caustics rollout in the Render Settings.
Overview
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Caustics Parameters
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Mode
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Progressive Mode
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The Progressive method doesn't need most of the controls used for traditional New Map mode, so the controls are grayed out. Only the Search distance (Pixels)control and the Multiplier have an effect on the result.
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Tips when working with progressive caustics: Required:
Optional:
Managing Expectations:
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Advantages:
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Limitations:
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On Render End
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Example: Search Distance
For this example, the Caustics Multiplier is 80 (Light Attributes) and the rest of the parameters are at their default values. The light used in the scene is VRaySun. The Caustics method is set to Progressive. The Multiplier is set to 15. Note that the Search Distance is in pixels.
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Here the caustics mode is New Map. For this image, the light's Caustics Multiplier parameter in Light Attributes is set to 80 and the rest of the parameters are at their default values. As seen from the images, the larger Search distance produces blurrier caustics. The scene units are centimeters.
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Example: The Light Caustics Subdivs Parameter
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Example: The Max Photons Parameter
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In this example the Caustics Multiplier parameter in Light Attributes is set to 80 and the rest of the parameters are at their default values. VRaySun is used in this scene. As can be seen, the larger value of the Max photons parameter causes the caustics to appear much smoother. The Caustics mode used is New Map.
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Example: VRaySun Photon Emit Radius
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This example shows how a light's photon emit radius affects the caustics effect. Here we use a VRaySun to light the scene. The Caustics Multiplier parameter in Light Attributes is set to 80 and the rest of the parameters are at their default values. The Caustics mode is New Map.
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Notes
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