VecFlow0.1.0
FlowsOperators

Colour

Set the colour of particles as they enter an event, with a little random difference between them.

VecFlow 0.1.0

Set the colour of particles entering the event.

Add it
EventAdd OperatorLooksColour
Sends on
Nothing: it has no wire.
Influence
Yes: it does as much as a value says, particle by particle (0 none, 1 all of it).

When to use it

To colour particles: orange sparks, white snow, a different colour for each stage, such as sparks that turn grey as they become ash.

Without a Colour (or a Set Value setting color) anywhere in the flow, particles are coloured by their speed, from dark blue when still to white hot when fast. With one anywhere in the flow, particles none has coloured are white.

Set it up

Sparks turn to ash: each event's Colour colours the particles as they enter it.BirthForcesPhysicsLooksTests

Settings

As the flow editor’s sidebar shows them. Changing any of them marks the bake old; those marked Keyframable can also change through a bake.

Colour
Keyframable
Colour

The colour particles take.

Variation
Keyframable
0.10 to 5

Random difference, either way.

InfluenceEmpty

One of the flow’s number values, to weigh it by, particle by particle. Empty for all of it, on all of them. See Influence.

Variation

Each of red, green and blue is give or take Variation, apart from the others: 0.1, the default, gives a slight mix of shades; much more mixes in other colours. A colour never goes below 0. It can go above 1, which glows brighter in the particles' material.

When it acts

Colour sets the colour of particles as they enter its event, born there or sent there. Keyframe it to colour the particles born at each moment.

In the render

The particles' own material shows the colour, glowing a little. In a material of your own, read it with an Attribute node named vf_color, of type Instancer for particles shown as shapes (as the Confetti starter does).

Works with

  • Set Value sets color from anything else: from Random between two vectors for a colour each, or from a value.
  • Influence: weighed by a value, a particle's colour goes that share of the way to the new one. At 0.5, halfway between.

Problems you may see

The editor raises no problems of its own for Colour.

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