The Essential Thinking Of Roughness And Anisotropy (4)

In the article “The Essential Thinking Of Roughness And Anisotropy (3)”, we have understood that the essence of roughness is bump. Then we finally have to start the theme of our issue - use roughness to restore the bump effect of the ring scratches.
Using a rendered flowmap image, use this map to perform a series of node transformations, and finally insert an anisotropy rotation channel to make the anisotropic highlights rotate for the purpose.
In fact, the essence of the flowmap is the position of the plane coordinates, and the value of XY is recorded in the red and green channels. Converting to an anisotropy rotation map is to calculate an angle by the position of a point, and use this angle to control the rotation.
The core is to use a function called atan2 (some tools have this, such as Arnold and infrastructure designer, some tools are not, such as V-ray and redshift)

When attempting to render this effect using a non-Arnold renderer, the conversion of the flowmap to the anisotropy rotation map cannot be achieved due to the lack of mathematical tools. So I tried to use Substance Designer as an intermediate software for conversion.
The following is a screenshot of the node in the pixel process in SD. The main function is to convert the flowmap into an anisotropy rotation map.

The result of the conversion is this, it can be seen that the black and white scratches (and some of the scratches are negative, so the whole picture looks very dark):

Finally, use the anisotropy rotation map generated in this SD directly, you can also render the effect we want.

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Arnold for Maya Tutorial: Ice Cube Material
Arnold for Maya Tutorial: Ice Cube Material
Fox Renderfarm is known as a powerful but affordable render farm in the CG industry. Fox Renderfarm supports most mainstream software, Renderers, and Plugins, including Maya and Arnold. This article is about the knowledge of ice cube material in the basic material related learning in the Arnold tutorial. I hope it can be helpful for your learning of Arnold. In all kinds of texture making, ice cubes are a special kind. The overall texture of the ice cube is transparent, and has high specularity and refraction, as well as a certain caustics. Although the ice cubes are smooth, fine particles can still be seen at a certain angle. These particles are actually some small white bubbles generated during the ice-making process. There are many ways to achieve this effect. Today we will share a method of making ice cubes. Production First create a block to serve as the main body of ice. Then create an Arnold base shader and modify some of the settings. Because the ice cube material is transparent. There is no color, so there is no surface color. In Diffuse, set Color to black. Increase the Weight value in Specular. Because the surface of ice has no roughness and is very smooth, you need to open Fresnel to simulate this effect. Set the refraction, the value of Weight also needs to be adjusted up, the value of IOR is set to 1.33, and then check Fresnel, also need to check Caustics. Now the basic texture of the ice cube has been set. Now you need to add a small bubble effect to the ice cube. First create an Arnold 3D texture material, give the model, the following dialog box appears, just close it. After jumping out of the Aibump3d1sg node, you just need to drag the created Arnold texture to the Surface Shader in Arnold of Aibump3d1sg, then the model will appear small bubbles of bump effect. Next, place the ice texture made in the Shader of Aibump3d1 in the texture. Next, you need to add a Stucco texture map to the Bump Map in the 3D node, and then change the Bump Height to 0.5. Now that the material part is complete, the rest needs to add an HDRI. Open the material editor, create an aiSky environment ball map in Arnold, and paste an HDR environment map in Color. Change the value of Intensity to 2. Some settings are required before rendering. Click the Background link in the Environment to create the aiSky texture that was just created, so that the lights in the scene are set up. The sampling value of Cameraca is increased to 5 (the higher the value, the slower the rendering speed). Refraction value is set to 4. Set the Refraction value to 4 in Ray depth. Create a sphere as an environment and check Visibe in Refiections in Render Stats. Then conduct a rendering test. Rendering In 3D texture mapping, Maya's own 3D texture mapping can achieve many different effects (turn off the highlighter and refraction of the shader, and the following effects appear, The highlight and refraction of the shader are turned on, rendering:
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2020-05-22
Arnold\ V-Ray\ Octane\ Conora\ RedShift, Which Renderer Is The Best?
Arnold\ V-Ray\ Octane\ Conora\ RedShift, Which Renderer Is The Best?
Nowadays, many people use 3D software to create their works, so the use of the renderer is essential. There are many popular renderers, including V-Ray, Octane, Arnold, Conona, RedShift. But for many new 3D artist, which renderer is the best? The principles of these renderers are basically the same, but the operation methods are somewhat different. Of course, the focus of each rendering is different. Let us take a look at it now. Basic introduction to the renderer: The work from the Runner in Evermotion 2017, rendered by V-Ray. V-Ray The V-Ray renderer focuses on interior design and outdoor design for 20 years. The biggest feature is that it is almost half of the building performance, and the latest 4.0 version of the various functions are also very perfect, many works can be fake. Disadvantages, perhaps because V-Ray has too many setting parameters, material adjustment and lighting performance is very difficult, not very friendly to novices! Aronld official show Arnold Arnold is very powerful. The physics-based ray tracing engine CPU renderer is the most stable! Of course, the CPU is not strong enough, the rendering speed is also anxious, especially the rendering of transparent objects such as glass, as well as its powerful node-like operation, so that novices love and hate it! Of course, as an attitude to study the renderer, Arnold is highly recommended to learn! RedShift Next, talk about RedShift, the GPU-based renderer, the most intuitive experience is that the real-time preview and rendering speed is fast, and has a powerful node system like Arnold. It is more suitable for artistic creation, especially for animation. As for the authenticity of the rendering effect, it takes a lot of time to practice and accumulate knowledge. Octane Octane is also a GPU-based renderer. First of all, its SSS and replacement functions are quite good. The speed is also very fast, the light is softer, and the rendering looks very comfortable. Similarly, if the slightly larger scene is solved by PL, the efficiency will drop, but the speed is not fast. There are also problems with dryness that can sometimes become one of the features of the work! PS: The current version of OC does not support A card, nor can it exclude lights. The work from the first place of Evermotion 2017, rendered by Corona. Conona is also a highly recommended renderer. It comes from V-Ray. It can be seen as a simplified version of V-Ray. LightMix lighting solves the trouble of late dimming. The material system will not have to worry about it by default. Very small and practical, quick to get started, of course, just out of the official version, it is said that next year will be a node system, while the animation is somewhat weak! If you do indoor and outdoor design, static frame rendering can be used, after all, it is best at the ray tracing rendering engine! In fact, the renderer is just a step in the work, we can choose different renderers according to different work content, find the best for you.
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2019-04-15
Arnold Render Farm | Fox Render Farm
Arnold Render Farm | Fox Render Farm
Fox Renderfarm is a global technology company specialized in cloud computing services for rendering in entertainment industry. We supports most popular 3D software, renderers and plugins all over the world, like 3ds Max, Maya, Cinema 4D, SketchUp, Blender, LightWave, V-Ray, Redshift, Corona, and more. Supported internal and external plugins for 3ds Max, Maya, or Cinema 4D are integrated to our Arnold support. GPU & CPU rendering are both available in arnold render farm. Fox Renderfarm fire up thousands of rendering nodes instantly, high availability, no waiting necessary, easy to use, refers to MPAA security standards, also a flexible render farm pricing for you. The more reason you choose us in arnold render farm are below: - The partner of Oscar winning production teams. - With Hollywood level production experience for years. - 24/7 Live customer care & technical support. - Response time: 10-15 mins. - Contact available via Skype/Email . - As low as $0.04 per core hour - Volume discounts available up to 60%. Fox Renderfarm has an outstanding team with over 20 years’ experience in CG industry. Team members are from Disney, Lucasfilm, Dreamworks, Sony, etc. With professional services and industry-leading innovations, they serve leading special effects companies and animation studios from over 50 countries and regions, including two Oscar winners. In 2015, Fox Renderfarm formed a global strategic partnership with Aliyun (Alibaba Cloud Computing) to provide global visual cloud computing services. Get $20 free trial to register and rendering your artwork online now!
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2018-11-27
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