Initial commit: Complete project foundation with all documentation, scripts, and project structure
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Dubai Metaverse Team
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docs/PARTICLE_FX.md
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271
docs/PARTICLE_FX.md
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# Particle Effects - Dubai Metaverse
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## Overview
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This document catalogs all particle effects for the Dubai Metaverse project.
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## Particle Systems
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### P_Dust
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**Purpose**: Ambient dust particles in the air
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#### Properties
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- **Type**: GPU Particles
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- **Spawn Rate**: Low to medium
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- **Lifetime**: Long (10-30 seconds)
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- **Size**: Small (0.1-0.5 units)
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- **Color**: Beige/brown (dust color)
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- **Movement**: Slow drift, wind-affected
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#### Implementation
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1. **Emitter Setup**:
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- Spawn rate: 5-10 particles/second
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- Lifetime: 15-25 seconds
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- Initial velocity: Low, random
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2. **Visual**:
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- Texture: Dust particle texture
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- Size: Small, random variation
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- Color: Beige/brown, slight variation
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- Opacity: Low (0.3-0.5)
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3. **Behavior**:
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- Wind-affected
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- Gravity: Slight downward
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- Collision: None (or ground collision)
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#### Placement
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- **Areas**: Open areas, roads, construction sites
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- **Density**: Low to medium
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- **Distance**: Visible at medium distance
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---
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### P_HeatDistortion
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**Purpose**: Heat distortion effect above hot surfaces
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#### Properties
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- **Type**: Post-process or material effect
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- **Intensity**: Subtle
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- **Distance**: Above hot surfaces (roads, buildings)
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- **Falloff**: Distance-based
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#### Implementation
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1. **Material Function**:
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- Create material function
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- Use distortion node
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- Apply to surfaces or post-process
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2. **Settings**:
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- Distortion intensity: 0.1-0.3
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- Distance falloff: Exponential
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- Affected by time of day (stronger during day)
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#### Placement
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- **Surfaces**: Roads, building roofs, hot surfaces
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- **Time**: Stronger during day, weaker at night
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---
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### P_SandBlowing
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**Purpose**: Sand particles blowing in wind
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#### Properties
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- **Type**: GPU Particles
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- **Spawn Rate**: Medium
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- **Lifetime**: Short (3-10 seconds)
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- **Size**: Small to medium (0.2-1.0 units)
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- **Color**: Sand color (beige/tan)
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- **Movement**: Fast, wind-affected
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#### Implementation
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1. **Emitter Setup**:
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- Spawn rate: 10-20 particles/second
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- Lifetime: 5-8 seconds
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- Initial velocity: High, wind direction
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2. **Visual**:
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- Texture: Sand particle texture
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- Size: Small to medium
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- Color: Sand color
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- Opacity: Medium (0.5-0.7)
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3. **Behavior**:
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- Strong wind effect
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- Gravity: Downward
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- Collision: Ground collision
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#### Placement
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- **Areas**: Desert areas, open spaces, windy areas
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- **Conditions**: Windy conditions, sandstorms (optional)
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---
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### P_Fountain
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**Purpose**: Water fountain particle effects
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#### Properties
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- **Type**: GPU Particles
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- **Spawn Rate**: High
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- **Lifetime**: Short (1-3 seconds)
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- **Size**: Small to medium (0.1-0.8 units)
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- **Color**: Water color (white/blue)
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- **Movement**: Upward spray, gravity-affected
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#### Implementation
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1. **Emitter Setup**:
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- Spawn rate: 50-100 particles/second
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- Lifetime: 1-2 seconds
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- Initial velocity: Upward, high
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2. **Visual**:
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- Texture: Water droplet texture
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- Size: Small, random variation
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- Color: White/light blue
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- Opacity: High (0.7-1.0)
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3. **Behavior**:
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- Gravity: Strong downward
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- Collision: Ground/water collision
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- Splash: Splash effect on impact
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#### Placement
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- **Locations**: Fountains, water features
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- **Density**: High near fountain, lower at distance
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---
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## Particle System Organization
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### Folder Structure
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```
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Content/Assets/FX/
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├── P_Dust.uasset
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├── P_HeatDistortion.uasset
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├── P_SandBlowing.uasset
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├── P_Fountain.uasset
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└── Textures/
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├── T_Dust_Particle
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├── T_Sand_Particle
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└── T_Water_Droplet
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```
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### Naming Convention
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- **Format**: `P_EffectName_Type`
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- **Examples**:
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- `P_Dust_Ambient`
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- `P_Fountain_Water`
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---
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## Performance Optimization
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### Particle Optimization
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1. **Spawn Rate**: Optimize spawn rates
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2. **Lifetime**: Optimize particle lifetime
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3. **LODs**: Use LODs for particles
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4. **Culling**: Cull particles outside view
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### GPU Particles
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- **Use GPU Particles**: For better performance
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- **Limit Count**: Limit particle count
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- **Optimize Shaders**: Optimize particle shaders
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---
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## Integration
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### With Lighting
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- **Lighting**: Particles respond to lighting
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- **Shadows**: Particles cast/receive shadows (optional)
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- **Time of Day**: Particle appearance changes with time
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### With Weather
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- **Wind**: Particles affected by wind
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- **Weather Conditions**: Particle intensity varies with weather
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### With Audio
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- **Audio Cues**: Trigger audio with particles (optional)
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- **Synchronization**: Sync particles with audio
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---
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## Testing
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### Visual Testing
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1. **Appearance**: Verify particles look correct
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2. **Behavior**: Verify particle behavior is realistic
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3. **Performance**: Test performance with particles
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### Performance Testing
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1. **Frame Rate**: Test frame rate impact
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2. **Memory**: Test memory usage
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3. **Optimization**: Test optimization settings
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---
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## Troubleshooting
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### Common Issues
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**Issue**: Particles not spawning
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- **Solution**: Check spawn rate settings
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- **Solution**: Verify emitter is active
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**Issue**: Particles too bright/dark
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- **Solution**: Adjust color and opacity
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- **Solution**: Check lighting settings
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**Issue**: Performance issues
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- **Solution**: Reduce spawn rate
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- **Solution**: Use LODs
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- **Solution**: Optimize particle shaders
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---
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## Best Practices
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### Particle Design
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1. **Subtlety**: Keep effects subtle and realistic
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2. **Performance**: Balance quality and performance
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3. **Variation**: Add variation for natural look
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4. **Integration**: Integrate with other systems
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### Workflow
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1. **Prototype**: Prototype effects quickly
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2. **Iterate**: Iterate based on feedback
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3. **Optimize**: Optimize for performance
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4. **Document**: Document particle settings
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---
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**Version**: 1.0
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**Last Updated**: [Current Date]
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