Using gravity to pull particles (PB only)Use Gravity to pull existing particles in a direction you specify. As in the physical universe, particles accelerate in the direction of gravity. ![]() Gravity set to zero (left) does not affect particle direction. Increased gravity (right) pulls particles down. You can adjust the following options for Gravity: Force Specifies the force of gravity. Positive values increase the force, pulling particles more strongly. Negative values reduce the force. Force Random Spread Specifies a range of randomness for the Force. At zero, all particles fall at the same rate. At a higher value, particles fall at slightly different rates. Although pure gravity accelerates all objects equally, increasing the Force Spread can produce more realistic results with subjects such as leaves falling through air, where there is enough air resistance to vary the leaves' rates of descent. Direction Specifies the angle along which gravity pulls. The default is 180 degrees, which simulates the real world by pulling particles toward the bottom of the frame. Affects Specifies a subset of the layer's particles to which Gravity applies. See Using Affects options to specify particles (PB only). |