Trapcode Particular

Layer Maps Group

Size group

The Size group lets you change the size of the particles in the system by using the luminance values of a source layer. Black regions of the layer image will have a particle size of 0, which creates holes in the field. White regions have their particle size set to the maximum value of the Particle group> Size control.

At left, a layer with a gradient ramp. In middle, the particle field with Particle Size set to 8. At right, the gradient ramp is applied as the Size map with Map Over set to XY.