Hot Air Balloon Ascent
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A colorful balloon with an 8-stripe lathe-geometry envelope rises through a sunrise sky, drifting past 18 procedurally-jittered cone mountains and a field of 400 sprite-based clouds. The sky is a vertex-colored gradient sphere blending four sunset hues, lit by a directional "sun" light plus a flickering point light standing in for the burner flame.
Clouds: 400 sprites | Mountains: 18 (cone geo, 6-8 sides)
Envelope: 20 lathe segments x 24 radial, 8 gore stripes
Base ascent speed: 1.4 units/s | Fog density: 0.006
Flame flicker: sin(t*12) +/- random