Add gravity, wind and air
Use an Empty with the Force role to control gravity, wind and how cloth reacts to air.
Cloth moving in wind, with gravity and air resistance you control.
- A scene that bakes.
Step by step
- Add an Empty
Add an Empty, turn on Cloth neXt for it in the Physics tab and set Object Type to Force.
- Set gravity
Gravity is 9.81 by default. Gravity Axis chooses its direction and does not depend on how the Empty is rotated.
- Add wind
Increase Wind. It blows along the Empty's local +Z axis, so rotate the Empty to aim it.
- Make the air work
Wind only pushes the cloth while Air Density is above zero. The default 0.01 gives a visible effect.
- Add gusts
Under Gusts & Turbulence, add gust strength for gusts; Noise Scale makes them slower and broader or quicker. Scrub the timeline to preview the wind.
- Animate if needed
Keyframe the values like any Blender property; animated values are used during the bake.
The cloth moves in the direction the Empty points, and gusts vary over time if you added them.
If something goes wrong
- Wind has no effect
- Air Density is zero. Set it above zero.
- Cloth floats or falls the wrong way
- Check Gravity Axis; rotating the Empty does not change gravity.