And why they disappeared again!

The steam dome is a vital component of most steam locomotives. But some have not just one dome, but up to four. Why? What's their purpose? All models in this video were created, rendered, and animated by myself using Blender. Support what I do by becoming a member:    / @steelbridgemodels   Discord:   / discord   Gumroad: https://steelbridgemodels.gumroad.com/ Instagram:   / steelbridgemodels