Rain
In 3D film production liquids, dust, and rain are created by 3D design software to show environmentally friendly details, but it takes more time and effort in the rendering process and the dynamic simulation process, so I decided in my film to follow the most time-saving system, which is Compositing rain through Adobe After Effects, but I didn't just create a layer and place it on top of the image! , I actually designed several effects on the X, Y, and Z axes, to give them more realism and make sure to show some hidden details.
Fog
Adding fog helps to blend the foreground, middle, and background, which helps produce a close-to-reality image.
Compositing