See the former post about ARFoundation working on LWRP 3.3.0 for context. TLDR: "lwrp-support" branch on arfoundation-samples repo has been updated to support the latest LWRP 4.8.0-preview. The "lwrp-support" branch has a folder called LWRPSupport that has all the files needed. If you want to see a starter project that works with LWRP, open SampleLWRPScene using Unity 2018.3 and build it to your device - it should just work! To make it work with an existing project, follow these steps: 1. You must change your whole project to use LWRP. See https://blogs.unity3d.com/2018/02/2...er-pipeline-optimizing-real-time-performance/ (or for TLDR: create a LightweightRenderpipelineAsset and set it to the Renderpipeline parameter in Graphics settings).This might cause some of your existing materials to not work (even if you attempted to upgrade them). Fix these materials by replacing them with new materials that support LWRP. There is a folder called LWRPSupport in the root. This contains all the components needed to support LWRP for ARFoundation background rendering. 2. Next, locate your ARCamera game object which lives under the ARSessionOrigin game object, and examine it in the Inspector. Note the ARCameraBackground component. ARFoundation has the concept of a CustomRenderAsset which you can enable on your ARCameraBackground component. Check the “Use Custom Renderer Asset” on the component, which should reveal the “Custom Renderer Asset” parameter. Into this parameter, drag the LWRPBackgroundRendererAsset asset from the LWRPSupport folder. This should setup everything you need to make your app render the scene properly with LWRP. For more information on how this works, you can look at the source files in the LWRPSupport folder. There is some functionality in ARFoundation that was added to change the background renderer from the default behavior to use the CustomRendererAsset specified one. 3. LWRPSupport folder contains shaders, materials and scripts that support the renderer above. It also contains a LWRPBackgroundRendererAsset that is used to provide the renderer and its settings to ARFoundation. To create one of these assets, select Assets>Create>XR>LWRPBackgroundRendererAsset which should create the asset in your project folder. In order for the background rendering shaders to be included when building your project, it needs to be referenced from somewhere, and this asset also allows you to reference the materials that use those shaders so that they are included. 4. If you want to take advantage of the shader graph you will need to make sure to import the same version as the LWRP you're using. To do this open the package manager and click Advanced -> Show preview packages, next locate Shader Graph and select the version number in the upper corner. Under All versions locate 4.8.0-preview and click Install. Please watch the arfoundation-samples project for future examples that include shader graphs. And enjoy making cool new content with ARFoundation and LWRP!