Retro Game Mechanics Explained

Castlevania IV 4-3 Tunnel Background - Audiovisual Effects Pt. 02 (2019x10)

Air date: Oct 21, 2019

After flipping the level upside-down in 4-2, Castlevania IV uses more mode 7 capabilities to create a spinning tunnel to traverse through. But how was this effect pulled off? It's all explained right here.