ScriptableRenderPipeline/com.unity.render-pipelines.lightweight/LWRP/Passes/DrawSkyboxPass.cs

using UnityEngine.Rendering;

namespace UnityEngine.Experimental.Rendering.LightweightPipeline
{
    public class DrawSkyboxPass : ScriptableRenderPass
    {
        private RenderTargetHandle colorAttachmentHandle { get; set; }
        private RenderTargetHandle depthAttachmentHandle { get; set; }

        public void Setup(RenderTargetHandle colorHandle, RenderTargetHandle depthHandle)
        {
            this.colorAttachmentHandle = colorHandle;
            this.depthAttachmentHandle = depthHandle;
        }

        public override void Execute(ScriptableRenderer renderer, ScriptableRenderContext context, ref RenderingData renderingData)
        {
            CommandBuffer cmd = CommandBufferPool.Get("Draw Skybox (Set RT's)");
            if (renderingData.cameraData.isStereoEnabled && XRGraphicsConfig.eyeTextureDesc.dimension == TextureDimension.Tex2DArray)
            {
                cmd.SetRenderTarget(colorAttachmentHandle.Identifier(), depthAttachmentHandle.Identifier(), 0, CubemapFace.Unknown, -1);
            }
            else
            {
                cmd.SetRenderTarget(colorAttachmentHandle.Identifier(), depthAttachmentHandle.Identifier());
            }

            context.ExecuteCommandBuffer(cmd);
            CommandBufferPool.Release(cmd);

            context.DrawSkybox(renderingData.cameraData.camera);
        }
    }
}