BP VFX ENV SmokeWispy

Wispy smoke — ideal for subtle ambient accents.

General Parameters

• Spawn Rate — Number of particles spawned per second.
• Lifetime — Random float range for particle lifetime.
• Sprite Size Scale — Global multiplier for sprite size.
• Sprite Size — Sprite size. Random float between min and max.
• Color — RGBA sprite color (Alpha = transparency).
• Emission — Brightness multiplier applied to the color.
• Material Index — Select one of two textures.
• Camera Offset — Pushes sprites toward the camera to reduce excessive depth-fade transparency.
• Flipbook Speed — Flipbook animation speed.
• Active — Enables / disables the effect.

Animation Parameters

• Sprite Scale Animation — Scale multiplier at start and end of particle life.
• Scale Curve Power — Power applied to the interpolation curve between scale multipliers. Values > 1 make the curve more concave; values < 1 make it convex.
  (See power-func.gif for visual reference.)
• Rotation Rate — Random float range for animated rotation; randomly multiplied by -1 to avoid uniform rotation direction.
• Fade in / Fade Out Time — First = fade-in duration; second = fade-out duration.

Velocity and Forces Parameters

• Velocity Cone Angle — Cone angle within which velocity direction is randomized.
• Velocity Intensity — Random float range for velocity strength (local X-axis). Rotate the actor to change global flow direction.
• Force Intensity — Intensity of the force applied along the force vector (visualized with a green arrow). Controlled by Force Rotation.
• Drag — Damping force.
• Force Rotation — Rotation of the force vector (green arrow).
• Noise Strength — Strength of the noise applied to force fields.
• Noise Frequency — Frequency of the noise applied to force fields.

Dynamic Material Parameters

• Use Dynamic Material — Creates a Dynamic Material Instance when enabled.
• Alpha Power — Power applied to alpha channel.
• Depth Fade Distance — Distance for depth-based fade near geometry.

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