particle-systems_skill

Overview

This skill teaches how to create polished, dynamic visual effects using particle systems, physics simulation, GPU compute, and post-processing. It covers architecture, common effect recipes (explosions, fire, magic), engine-ready controllers and pooling, and performance guidelines for targets from mobile to PC and VR. The goal is practical, production-ready techniques to build efficient VFX for games.

How this skill works

The skill inspects particle lifecycle stages: emission, simulation, rendering, and death, and shows how to configure each stage for desired behavior. It provides concrete recipes for layered effects, example Unity controllers and compute shader code for GPU particles, and a pooling system to avoid allocation spikes. Performance guidance explains particle budgets, LOD, batching, and when to move simulation to the GPU.

When to use it

• When you need layered, dynamic effects (explosions, fire, magic) with predictable lifetimes.
• When runtime performance matters and you must limit draw calls and overdraw across platforms.
• When building high-particle-count effects that benefit from GPU simulation or instancing.
• When you want production-ready patterns: pooling, reusable controllers, and light animation.
• When targeting multiple platforms (mobile, VR, console, PC) with different budgets.

Best practices

• Design effects as layered systems (flash, core, debris, smoke, sparks) to control complexity.
• Use pooling for emitters and effects to prevent GC spikes and reduce instantiation overhead.
• Share materials, use texture atlases, and enable GPU instancing to reduce draw calls.
• Implement LOD and cull off-screen emitters to respect platform particle budgets.
• Move heavy simulation to compute shaders or VFX Graph/Niagara when particle counts exceed CPU limits.
• Tune lifetime and alpha curves so particles fade out smoothly rather than pop.

Example use cases

• Explosions: burst emission with layered fireball, debris physics, smoke, sparks, and shockwave ring.
• Continuous fire: looping core flame, embers, smoke, turbulence noise, and flickering light.
• Magic spells: pulsing core, orbiting particles, motion trails, impact burst, and residual sparkles.
• Impact effects: pooled spark and decal spawns from a centralized VFX pool manager.
• High-count scenes: GPU compute shader driving positions, velocities, turbulence, and fade-out for millions of particles.