Here's a blend file for some procedural mountains that you can get infinite variations of!The snowy and rocky regions are procedurally shaded, based on the z normal value of each point.The blend file also has two procedural variations of volumetric cloud objects that can help you to add atmoshphere and mood to your scene! You can generate infinite variations of these clouds too. Math is fun!You can decrease the sample count to around 64 or even 32 along with the openImage denoiser included in Blender 3.0 for speedy render times!The included animation was rendered at 20 samples with denoiser and motion blur and minor compositing, which brought the render time down to 30 seconds per frame on my 1050ti mobile.