Treasure Chest Lock Break

HOW IT'S MADE

Treasure Chest Lock Break stacks 10 particle emitters, each with its own job. Techniques worth a look: collisions, particles stretched along their motion, keyframed parameters and post filters (bloom). 2 scene layers (ground and props) show in the studio for context and stay out of every export.

It loops seamlessly every 3.4 s, and 7 of its layers fire in bursts, so it pulses instead of flowing evenly. Start times are staggered from 0 s to 3.06 s, so the layers arrive one after another. To change its colour, select "Open flash" in the studio and edit Colour A and Colour B. Size on the same layer sets how big its particles are.

Layers, in draw order

1. Back light, Inner glowsprite / additiveA placed glow.
2. ShadowspriteA placed glow.
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 gold and orange.
4. Lid (open), Chest, Lid (closed)spriteA placed image.
5. Chains breakparticlesOne burst of 28 shards at 0.72 s. They are flung outward, fall under gravity and bounce when they hit something.
6. Break flashparticles / additiveA single particle at 0.72 s. It grows as it ages. Colour: pale gold.
7. Lock sparksparticles / additiveOne burst of 26 streaks at 0.72 s. They fall under gravity. Colours range between white and gold.
8. Open flashparticles / additiveA single particle at 0.82 s. It grows as it ages. Colour: gold.
9. CoinsparticlesA stream of coins and gems along a line, its rate keyframed over the loop. They fall under gravity and bounce when they hit something. Colour: white.
10. Sparklesparticles / additiveA stream of stars from a disc, its rate keyframed over the loop. They swell and then shrink away. Colours range between white and pale gold.

3 more layers are in the studio.