Common Chest Opening

HOW IT'S MADE

Common Chest Opening stacks 6 particle emitters, each with its own job. Techniques worth a look: sprite modules, collisions, keyframed parameters and post filters (bloom).

It loops seamlessly every 1.8 s, and 5 of its layers fire in bursts, so it pulses instead of flowing evenly. Start times are staggered from 0 s to 1.55 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: grey.
3. Lid Open, Chest, LidspriteA placed image. Extras: palette swap, outline and keyframed motion.
4. Inner Glow, Seam Leaksprite / additiveA placed glow.
5. Open Flashparticles / additiveA single particle at 0.62 s. It grows as it ages. Colour: white.
6. Open PuffparticlesOne burst of 8 smoke puffs along a line at 0.62 s. They grow as they age, spin and slow down with drag. Colours range between pale blue and blue.
7. CoinsparticlesOne burst of 5 coins and gems along a line at 0.64 s. They fall under gravity, bounce when they hit something and grow as they age. Colour: white.
8. Rising Sparklesparticles / additiveA stream of stars along a line, its rate keyframed over the loop. They swell and then shrink away. Colours range between white and pale blue.
9. Out Poofparticles / additiveOne burst of 18 soft glows across a box at 1.55 s. They shrink as they age and slow down with drag. Colours range between white and pale blue.