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I am putting very important visualization resources and series: tutorials, tips, tricks, VRAY materials and settings, and mini-the-making (MTM) processes.

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Sunday, 27 January 2013

Water pool and Caustics Tutorial

First of all big thanks to Deo Saputra for sharing to us the materials on this tutorial.There are very few tutorials when it comes to caustics and we believe you will really get from this one.. Enjoy reading it.


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1. important Set Up Global Illumination Environment: Use Text Sky Map with the following settings

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Photon Radius: Used to control the caustics' radius. This value depends on the size of the scene.
Caustics Subdivision: This parameter controls the amount of photons that VRAY traces to estimate caustics. Large numbers means better quality but more memory needed, thus slowing down the calculation process.


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2. Caustics Parameters


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Maximum Photons: This is the maximum number of photons that will be considered when rendering the caustics effect on a surface. Smaller values cause less photons to be used and the caustics will be sharper, but perhaps noisier. Larger values produce smoother, but blurrier caustics. The special value of 0 means that V-Ray will use all the photons that it can find inside the search area.
Multiplier: this allows you to control the brightness of the photon map
Search distance. It allows you to specify the photon search distance manually. * Keep in mind that this value depends on the size of your scene. Lower values will speed up the rendering but may produce more noisy results. Larger values will slow down the rendering but may produce smoother results.

3. The Water Material

Reflection Layer

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IOR value

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Diffuse Layer

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Refraction Layer

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Fog Color

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Displacement Map

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You can download the Vismat together with the Texture HERE

Vray Options

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Here is the Final Render using the material.

Tip:  Be sure that the face of the water is not negative face. You might also want to apply the material on both side of your water surface.


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9 comments:

  1. thx dor sharing... caustics are always tricky!

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  2. -Displace water should have a stand-alone group,* if it fails then displace Caustic also do not appear,
    -Object(scene) must be in the photon radius
    -make sure the surface of the pool water is not negatif face(blue),
    -if it still fails, then explode and group return

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  3. thanks a lot all your tutorials are really helpful

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  4. This comment has been removed by the author.

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  5. This is really helpful, just one question though: which parameter decreases/ increases the size of caustics? Because I have an olympic pool of 25m W x 5m in Depth and I tried everything, but the caustics show up like small reflected bubbles, not getting an uniform result. At a smaller scale works perfectly fine.

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  6. Where 01 files are downloaded??

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  7. Where 01 files are downloaded??

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