Remember that the caustic patterns are formed by reflection and refraction off the curved surface of waves, on our water. I was finally only able to do it by using Overcomeon’s underwater caustic test scene. It was a big challenge for me to get Iray to generate caustic patterns in my underwater scene. This will take much longer to render, but will create more realistic looking results. I found such a bubble in the 3D Bubbles product by MindVision G.D.S.įinished underwater mermaid scene with caustics from a Gobo light.Īnother way to achieve caustics is to do it for real by setting up an appropriate scene with appropriate shaders, and then letting the Iray renderer physically generate the water caustics pattern. a bubble that is geometrically represented by both an outer and inner layer). Therefore, to test this out, I need a double layered bubble (i.e. Note that Abbe does not work on Thin Walled surfaces. This works on surfaces with volume, not on Thin Walled surfaces. Lower numbers (but greater than 0) give more dispersion on the surface, and the higher the value, the less dispersion. It has an additional parameter called Abbe.Ībbe is a conatant chromatic dispersion. That is what the Water Dispersive Iray shader addresses. The colors that you see are what’s left after the light waves interfere. Other waves cancel each other, removing a frequency or color from the mixture. Some waves add together, making certain frequencies or colors of light brighter. When light waves reflecting from one layer of soap molecules meet up with light waves reflecting from the second layer of soap molecules, the two sets of waves interfere. These result in the many colors we may see on bubbles, in an oil slick, or in a rainbow.Ī bubble film is a sort of sandwich: a layer of soap molecules, a filling of water molecules, and then another layer of soap molecules. Therefore, I adjust the rotation until I get an interesting far-away skyline, that I am happy with (rotation = 270 degrees).Īnother very cool aspect of bubbles is that they have chromatic dispersion. Unfortunately, at this rotation, it is filled with large buildings and palm trees, which is not a very pleasing reflection on my water. I like the Barcelona Rooftops HDR that I got from sIBL Archives, so I use it here, starting with zero rotation.
To get a good reflection on my water, I want to pick a good environment map and rotation angle. When I look at the surface properties of my water plane, there are two key properties – reflection and refraction. Once I am done, I make a plane primitive and apply the Iray water shader to it.
#Daz studio 4.8 tutorials skin#
The only extra change I made here, is to make her skin appear more wet by increasing Glossy Reflectivity to 0.9, and decreasing Glossy Roughness to 0.4, for all skin surfaces. Here I am using FWSA Gillian HD and LF Sorbet Swimwear, which fits in very well with a water pin-up scene. Barcelona Sunset environment map with zero rotation.
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