Hi, I created this video with blender. Video and render siezes 1920x1080 Render engine - Cycles Clouds - volumetric shader. Stars - partical system. Rocks - geometry nodes. You can change all this part easily and you can creat your clouds. Render time can change your computer features. For the 10 seconds video I waited like 16 hours aproximately (nvidia 3070 + intel i7 12700k) For the better result or reduce time you can change settings. Also for different color variations you can use photoshop. I added 3 variations.