CGHOW | Ashif Ali

Summary of the Process:

1. Map and Material Setup:
   • Created a gray map using fog for the environment.
   • Used a custom shape texture to create the poison rain effect, focusing on green fading to black for the particles.
   • Created a material that combines red and green textures for the desired effect.
2. Particle Setup:
   • Used a custom alignment to make the particles ground-facing (Z-axis).
   • Applied a scale color curve to fade the particles to black over time.
   • Created a secondary black base that fades away, adding depth to the effect.
3. Rain and Drop Creation:
   • Designed the raindrops by using a radial material with a tail effect for the drop’s motion, adjusting parameters like radius and power to achieve the desired tail length.
   • Adjusted the gravity, velocity, and spawn settings for the raindrops, ensuring they fall realistically.
   • Applied a “kill volume” to make raindrops disappear when they hit the ground.
4. Splash Effect:
   • Created a mesh for splash effects using Maya, imported it into Unreal, and applied a material that fades from top to bottom.
   • Added event-based particle spawning when the raindrops collide with the ground.
   • Adjusted particle size, lifespan, and velocity to achieve realistic splashes upon impact.
5. Final Elements:
   • Added a mist effect that spawns after the splash, with a delay and additional parameters like size, gravity, and fade out.
   • Created a water wave effect, using texture coordinates to create a stretching wave effect.

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Key Notes:

• Event Handling: You made use of event handling to trigger splashes when raindrops hit the ground.
• Material Customization: The use of custom materials for both the poison rain and splash effects, as well as the “wave” effect, helps achieve a unique look and behavior.
• Particle Adjustments: You adjusted particle settings such as velocity, gravity, size, and lifetime to fine-tune the appearance and behavior of the rain and splash effects.

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Suggestions for Enhancements:

• Fog Adjustments: Consider adding more variations to the fog (density, color shifts) to create different atmospheres or intensities of rain.
• Sound Design: Add sound effects like rain or thunder for more immersion.
• Performance Optimizations: Make sure the particle count and material complexity are optimized for better performance in real-time environments, especially if the rain effect is used in large game scenes.