Houdini 22.0 Pyro

Pyro Configure Cigarette Smoke

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Overview

There are several Pyro Configure examples available through the tab menu. These are similar to shelf tools that put down networks of nodes for learning purposes. The Pyro Configure Cigarette Smoke example illustrates a simple rising wispy smoke effect. It can be used as a template for building wispy smoke in your scene.

Important nodes

pyro_sourceshape1

Controls the location, shape, and thickness of the smoke emission.

pyro_configure1

Adjusts the simulation resolution. Lower the Voxel Size value to increase the resolution, at the cost of considerably more simulation time and memory.

pyro_block_begin1

The start of the simulation loop. All nodes inside the highlighted simulation region run on every simulation step.

pyro_block_end1

The end of the simulation loop. This node contains important simulation controls. All nodes inside the highlighted simulation region run on every simulation step.

sharpen1

Sharpens the density field of the smoke simulation.

Learning from this example

To...Do this

Create different smoke sources

Change the Shape controls on the pyro_sourceshape1node. You can use one of the provided primitive shapes or connect a custom implicit surface as input.

Control the amount of smoke emitted

Change or animate the Scale parameter on the density sourcing section of the pyro_sourceshape1 node.

Control the amount of smoke dissipation

Adjust the Density parameters on the Field tab of the pyro_block_end1node to control how fast the smoke dissipates into the background.

Control the wind direction for the emitted smoke

Adjust the Ambient Velocity parameter on the pyro_block_end1 node.

Sharpen the smoke

Set the Select Input parameter to 1 on the switch1 node to use density sharpening. This sharpens the smoke, but the smoke will also linger longer in the air.

Control the behavior of the smoke

Adjust the parameters on the Forces tab of the pyro_block_end1 node, or place other force nodes between pyro_block_begin1 and pyro_block_end1.

Pyro

Sparse Pyro

Pyro instancing

COP Pyro