Rendering in CAD is a crucial step to showcase your designs in a realistic manner. By using CAD software, you can bring your 2D designs to life by adding textures, materials, lighting, and shadows. To render in CAD, start by setting up your scene with proper lighting and camera angles. Then, apply materials and textures to your models for a more realistic look. Finally, adjust the rendering settings to achieve the desired output. With these basic techniques, you can create stunning 3D renderings of your CAD designs.