User Manual

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NOTE: Pixels with a black (transparent) Alpha channel will still generate invisible
particles, unless you raise the Alpha Threshold above 0.0. This can slow down
rendering significantly.
An Alpha Threshold value of 1/255 = 0.004 is good for eliminating all fully
transparent pixels.
The pixels are emitted in a fixed-size 2D grid on the XY plane, centered on the Pivot
position. Changing the Region from the default of All allows you to restrict particle
creation to more limited areas. If you need to change the size of this grid, use a
Transform 3D node after the pRender.
Remember that the various emitter controls apply only to particles when they are
emitted. That is, they set the initial state of the particle and do not affect it for the rest
of its lifespan. Since pImageEmitter (by default) emits particles only on the first frame,
animating these controls will have no effect. However, if the Create Particles Every
Frame checkbox is turned on, new particles will be emitted each frame and will use
the specified initial settings for that frame.
pKill [pKI]
The pKill node
pKill Node Introduction
The Kill node is used to destroy (kill) any particle that crosses or intersects its region. It has no
specific controls, as it has only one possible affect on a particle. The controls found in the
Region tab are normally used to limit this node by restricting the effect to particles that fall
within a certain region, age, set, or by reducing the probability of the node applying to a
given particle.
Inputs
The pKill node has a single orange input by default. Like most particle nodes, this orange input
accepts only other particle nodes. A green bitmap or mesh input appears on the node when
you set the Region menu in the Region tab to either Bitmap or Mesh.
Input: The orange input takes the output of other particle nodes.
Region: The green or magenta region input takes a 2D image or a 3D mesh
depending on whether you set the Region menu to Bitmap or Mesh. The color of
the input is determined by whichever is selected first in the menu. The 3D mesh or a
selectable channel from the bitmap defines the area particles are killed.
Chapter – 103 Particle Nodes 2297