tyWind Helper

The tyWind helper can be used as an alternative to 3ds Max’s Wind spacewarp, within a flow. It has extra axial falloff controls.


tyWind Rollout

Force

  • Strength: controls the overall strength of the wind force.

  • Planer/Spherical/Planar (symmetrical): controls the outward direction of the wind force. Planar wind forces point in the direction of the icon arrow. Spherical wind forces point in all directions out from the center of the wind icon. Planar (symmetrical) wind forces point in opposing directions on either side of the icon z-axis plane.

  • Apply force behind icon: when enabled, particles below the tyWind force plane’s local z-axis will be affected by the tyWind forces. When disabled, they will not be affected.

Noise

  • Noise mode: controls which noise algorithm will be used.

  • Noise texmap: the texmap that will be used by the noise texmap mode(s).

  • Noise preview: a preview image showing a 2D representation of the selected noise mode.

  • Strength: the strength of the noise (a multiplier on the default noise range of [-1, 1]).

  • Frequency: the speed at which the noise will evolve over time.

  • Scale: the scale multiplier for position values sent through the noise algorithm. Smaller values create larger noise patterns.

  • Roughness: controls the amount of extra detail applicable noise modes will generate.

  • Lacunarity: controls the scale of successive noise octaves for applicable noise modes.

  • Iterations/Octaves: controls the number of overlapping noise patterns that applicable noise modes will generate.

  • Phase: provides manual control over the evolution of the noise over time.
  • Speed: controls how fast turbulence moves along the tyWind directional axis.

Increasing the speed value is a way to simulate more realistic gust-like patterns in the turbulence field. Instead of simply changing the turbulence pattern over time, like the frequency setting does, the speed setting moves the pattern through space along the direction of the tyWind icon.

Planar Influence

  • Distance: particles within this distance to the plane of the wind will be fully affected by the wind.

  • Falloff: the effect on particles beyond the base distance to the plane, but within this falloff distance, will diminish according to the inverse-square law.

Proximity Influence

  • Distance: particles within this distance to the position of the helper will be fully affected by the wind.

  • Falloff: the effect on particles beyond the base distance to the position of the helper, but within this falloff distance, will diminish according to the inverse-square law.

Axial Influence

  • Distance: particles within this distance to the z-axis of the wind will be fully affected by the wind.

  • Falloff: the effect on particles beyond the base distance to the z-axis, but within this falloff distance, will diminish according to the inverse-square law.

Legacy Influence

  • Decay: controls the distance decay of the wind force, using legacy 3ds Max spacewarp calculations.

Display

  • Range indicators: draws helpers shapes which represent the decay and axial falloff values in the viewport.

  • Icon size: controls the size of the tyWind icon.


Colliders Rollout

Adding meshes to the colliders rollout allows you to occlude particles from the tyWind force, if a colliding face separates them from the origin of the wind force on the tyWind helper.

Collider list

  • Mesh list: the list of meshes that may block wind forces from affecting particles.

Collider affect

  • Ray divergence: controls how many degrees to diverge force rays cast from the tyWind object towards particles. The larger the value, the less sharp blocking edges around colliders will be.

  • X/Y/Z: controls which axes of the rays will diverge.

  • Occlusion %: the amount to occlude particles from forces if a collider is hit.

Lower this value to simulate semi-occluding materials (ex: a screen door or thin cloth material). This value is additive across multiple colliders that are hit, so that if you set it to less than 100%, the more colliders that are hit, the more force-occlusion a particle will undergo.

  • Accuracy: controls how many rays will be cast towards each particle. Values greater than 1 will result in more gradual force strength falloff around obstacles.

tyFlow interaction

  • Collide with cloth meshes: when enabled, cloth meshes of the source tyFlow will be added to the list of mesh colliders.