Rare Chest Opening

HOW IT'S MADE

Rare Chest Opening stacks 8 particle emitters, each with its own job. Techniques worth a look: glowing strokes traced along shapes, sprite modules, collisions, particles stretched along their motion and post filters (bloom).

It loops seamlessly every 2.2 s, and 4 of its layers fire in bursts, so it pulses instead of flowing evenly. Start times are staggered from 0 s to 0.99 s, so the layers arrive one after another. It carries little colour of its own, so it takes a tint well: select "Open Flash" and set Colour A and Colour B. Size on the same layer sets how big its particles are.

Layers, in draw order

1. ShadowspriteA placed glow. Extras: keyframed motion.
2. Landing DustparticlesOne burst of 10 smoke puffs from a ring at 0.2 s. They grow as they age, spin and slow down with drag. Colour: blue.
3. Light Raysparticles / additiveA stream of streaks from a ring, its rate keyframed over the loop. They grow as they age and turn to face where they move. Colours range between pale blue and blue.
4. Lid Open, Chest, LidspriteA placed image. Extras: palette swap, outline and keyframed motion.
5. Inner Glow, Seam Leaksprite / additiveA placed glow.
6. Seam Sparksparticles / additiveA stream of streaks along a line, its rate keyframed over the loop. They slow down with drag. Colour runs from white to blue over each life.
7. Open Flashparticles / additiveA single particle at 0.95 s. It grows as it ages. Colour: white.
8. Open Ringstroke / additiveA glowing line traced along a circle.
9. Blue GemsparticlesOne burst of 6 coins and gems along a line at 0.97 s. They fall under gravity, bounce when they hit something, grow as they age and spin. Colour: white.
10. CoinsparticlesOne burst of 8 coins and gems along a line at 0.99 s. They fall under gravity, bounce when they hit something and grow as they age. Colour: white.

2 more layers are in the studio.