CommandBuffer

CommandBuffer即命令缓冲区。可以将一系列渲染指令添加到CommandBuffer中，在需要执行时通过Camera或者Graphics类进行执行，进而实现对渲染流程的控制。

创建CommandBuffer

cmdBuffer = new CommandBuffer(){ name = "XXX" };

DrawRenderer示例

cmdBuffer.Clear();
cmdBuffer.DrawRenderer(cubeRenderer, cmdMat);

DrawRenderer示例

cmdBuffer.Clear();
cmdBuffer.DrawMesh(mesh, Matrix4x4.identity, cmdMat);

SetRenderTarget示例

cmdBuffer.Clear();
cmdBuffer.SetRenderTarget(target);
cmdBuffer.ClearRenderTarget(true, true, clearColor);
cmdBuffer.DrawRenderer(cubeRenderer, cmdMat);

Camera使用CommandBuffer

把CommandBuffer添加到Camera类的执行序列中：

Camera.main.AddCommandBuffer(CameraEvent.AfterForwardOpaque, cmdBuffer);  

参考文章

https://www.cnblogs.com/llstart-new0201/p/12630384.html