Fire Portal shelf tool

Creates a particle simulation for a portal that rotates in a circular motion before dissipating.

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Important Nodes
Learning from this example

This shelf tool sets up a particle simulation that appears at a specific start frame and is constrained to a noised circular motion before receding into the center of the portal. It highlights a way to art-direct particles around a specific source shape to create a portal effect.

Pyro simulation in the viewport. Color space: ACES.

Pyro simulation rendered with Karma. Color space: ACES.

Important Nodes ¶

set_density_and_pscale1

This node initializes a pscale attribute based off on the relative density of the particles. The closer the particles are to each other, the larger the initial pscale attribute will be. This can create some nice stringy shapes in the particles.

oreintalongcurve1

The orientalongcurve1 node generates the normal attribute used inside the dopnet1 to update the velocity of the particles at each timestep. This helps keep the particles moving along the source shape.

Learning from this example ¶

To...	Do this
Change the source shape noise	Adjust the Amplitude, Amplitude Scale, and Element Size parameters on the mountain1 node.
Change the source shape attraction	Dive inside the `dopnet1` node and use the nodes inside the popvop1 node to shape the particle motion. For example, the Bias parameter in the mix1 node to mix between the points current position and the minimum position on the source shape. This helps keep the particles from flying too far away from the source shape.
Change the opening animation	Adjust the Uniform Scale parameter on transform1.
Change the closing animation	Adjust the Uniform Scale parameter on transform2.
Change the initial `pscale`	Adjust the Radius, Search Pts, and Rel Density parameters on the set_density_and_pscale1 node.
Change the color of the particles	Adjust the Color Ramp and Source Range parameters on attribadjustcolor1.

Fire Portal shelf tool

Important Nodes ¶

Learning from this example ¶

Shelf tools

Using the shelf ¶

Technical ¶