A low-poly 3D rendered mystical volcanic underground cavern at twilight, glowing geothermally heated crystal formations illuminate steam vents and underground hot springs, ancient dwarf-like miners with pickaxes work near molten lava rivers, pixel art gem and ore icons float in UI style, warm orange and deep crimson color palette, volumetric steam particles rising, side-scrolling composition with dramatic depth, nostalgic 16-bit RPG aesthetic meets modern indie art, industrious yet atmospheric glow of subterranean forge, detailed pixel art hammer and shield icons floating