We created the mountain and filled the scene with assets from Quixel Bridge. After adding the camera, the scene background through an HDRI and a fog environment, we rendered the scene with multiple render passes to further adjust the environment in Adobe After Effects (enhancing fog, adding clouds, tweaking sun rays, adding lens dirt, halation etc.). Finally we added fitting sound effects and upscaled our scene to a high quality 4k version using Topaz Video Enhance AI.