The Method to Make LightGroup of Arnold 5.1

A friend asked me before, how to make LightGroup in Arnold 5.1 version, because with LightGroup, we do not need to divide the Light Render Layer.
The method of Arnold 5.1's LightGroup is not the same as the previous version. I remember that the LightGroup property was added to the light at the beginning. This method only works for the alshader's shader, and then the light property bar is added in the AOV Light Group column, add LightGroup1 by ourselves in the AOV attribute, and apply the <L.'LightGroup'> command. After the Arnold 5.1 version, it was found that this method has failed. Even if you add the <L.'LightGroup'> command to AOV, still not working. Next, let me talk about how Arnold 5.1 makes LightGroup.
The first step is to create a light. In the AOV Light Group property column of the light, give it a name that you want of this LightGroup, I name it LGT_A here.
The second step is to add the RGBA (cloud rendering note that, it is must in uppercase) channel to the AOV channel. Why should we add the RGBA channel? Because I found that only the RGBA channel has its Light Group List property bar showing its effect. If you add a LightGroup channel, you will find that this property is in the closed state, and this RGBA must be uppercase, quite fucking. Then enter the RGBA channel properties and select the LightGroup you added to the Light Group List option. My scene made 3 lights, so there are three.
LightGroup appears after the rendering below.
Here is the rendering of render farm test:

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Shenzhen, China – When it comes to cloud rendering services, Rayvision has made a marked impact in the IT industry. In addition to being a pioneer of self-service , Rayvision became one of the pivotal sponsors, in the exciting 3D CG Sci-Fi Challenge for talented graphic designers. At a recent conference, a spokesperson for Rayvision said, “We believe that the best way to grow and develop is to help instill fresh new talent and ideas in a positive direction. We have always been adamant supporters of promoting new talent. As sponsors for the 3D CG Sci-Fi Challenge this year, we are proud to help talented graphic designers exhibit their futuristic visions and dreams on a greater and more realistic scale.” The best, visionary proposals of the competition will receive some notable prizes. These include a $250 render fee for the first place winners, $150 for the first runner up and finally, a render fee of $100 for the second runner up. Along with sponsors DreamWorks, American Industrial Light and Magic, SKG and various other animation companies from all over the world, Rayvision provides talented individuals the chance to explore and grow in CG. The 3D Sci-Fi Challenge focuses on honing and testing the skills of talented individuals who have the capabilities to envision an “alternative” universe with respect to a dystopian or utopian future. This challenge will run from February 20th to April 17th, 2015 and is open to everyone, including teams, and talented graphic designers from all over the world. Each participant has the freedom to upload more than one entry model and stand a chance of qualifying for the portfolio category if they upload more than eight models. “We suggest that everyone try their skills by participating in this grand event!” added the spokesperson. The CGTrader Staff, will judge each entry on quality, innovation and presentation. About the Company Shenzhen Rayvision Inc. is an internet technology company that specializes in research into cluster rendering and parallel computing technology, providing computing services for . It is the pioneer of ‘self service could rendering’. Renderbus, its brand, was the first company in China to offer a cloud-rendering platform. For the purpose of providing consistent service for CG studios in the world, RAYVISION Inc. launched a family brand, “RAYVISION”, globally, based on Renderbus (its domestic brand) and Fox RenderFarm (its overseas brand), in 2014. Rayvision promises to provide global users with more excellent, stable and consistent .
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Maya 2018 Arnold's Method of Making Motion Vector Blur in AOV Channel
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