Blender 2.8 has a user preference of using GPU and CPU simultaneously during rendering. So, when a scene is getting rendered using this preference and 4 threads:
- Is it true that during the beginning of render, GPU renders 1 tile and CPU cores render 3 tiles?
- And also, suppose that near the end of render, 4 tiles remain to render. GPU starts rendering a tile and CPU cores start rendering remaining 3. As GPU would finish its tile faster than CPU cores, will it become idle while CPU cores slowly finish their tiles? Or will it take control of another tile from a CPU core to finish rendering faster?