The document discusses particle effects and the Unity Visual Effect Graph (VFX Graph) tool. It provides examples of making basic particle effects using techniques like burst, turbulence, and aging properties. It then compares VFX Graph to Unity's built-in Shuriken particle system, noting that VFX Graph allows for more particles, performance, and creative freedom through a node-based interface. Finally, it argues that VFX Graph and node-based tools are the future of visual effects authoring.

1. Pham Thi Hong Sam
Vu Phuong Hoang

4. Effects made by many particles:
- Fire
- Smoke
- Dust
- Magic spells
- Projectiles
- Debris
- …
Particle Effects

5. How we MADE them ?
- Particle Systems:
- Unity’s Shuriken
- Unreal’s Cascade
- Houdini
- Adobe After Effect
- Sprite Sheet

6. How SHALL we make them ?

7. https://www.youtube.com/watch?v=rqMcPZoEc3U

14. Let’s make one !

15. Burst
On sphere
Turbulencewith delay
Conform to
mesh surface (SDF)
Change colorover time
Spawn trail for
each particle
Same position
Age
Change size &
color over time

16. Let’s break one !

17. Burst 10K cubes
On mesh surface
Random rotation & scale
Ageless
Loop by sine wave
Convert ranges
Let Y contribute
Blend 2 values

18. Shuriken
- Work on CPU
- 10K particles
- Average performance
- All options are visible
- For all Unity versions, all platforms
- Limited options
- Limited tools
- Fixed
- Need engineer for dynamic ones
- Bad for collaborations
VFX Graph
- Work on GPU
- 10M particles
- Great performance
- Steep learning curve
- Only for new Unity versions / platforms
- More freedom
- More tools (Point-Cache, Vector Field …)
- Variants by exposed properties
- Dynamic via binders
- Pack-able support from engineer (SubGraph)

19. Why should I learn it ?
- Alternative for complex effects
- Production-ready after 2 years in Preview

20. Why should I learn it ?
- Alternative for complex effects
- Production-ready after 2 years in Preview
- Node-based editors are the future
- Unreal’s Blueprint, Material Editor
- Unity’s Shader Graph, Bolt
- Substance Material Editor …

21. References
- Official homepage
- Latest documentation (incompleted)
- Block list (out-dated)
- VFX Graph Samples
- Spaceship demo
https://unity.com/visual-effect-graph
https://docs.unity3d.com/Packages/com.unity.visualeffectgraph@7.4
https://docs.unity3d.com/Packages/com.unity.visualeffectgraph@6.9/manual/Blocks.html
https://blogs.unity3d.com/2019/03/06/visual-effect-graph-samples/
https://blogs.unity3d.com/2019/08/19

22. - Shader Graph
- Post Processing
- Global illumination