Bloom

A Bloom emitter adds a glow to the view for a moment: a spell that discharges, a blast, a power-up. It is made by transforming a BloomEffect. Each emit makes one bloom, a temporary duplicate of the original, and three graphs shape it over its life.

What it makes possible:

A glow that flares with a blast. Emit 1, Lifetime 0.4, an Intensity graph from 1 to 0.
A glow that spreads as it fades. A Size graph from 10 to 40, with an Intensity graph from 1 to 0.
A pulse while a weapon charges. Mode Animate, Loop on, an Intensity graph of 0.2, 0.8, 0.2. A script raises Timescale to speed the pulse up.
A glow that holds after a power-up. Mode Animate, Loop off, an Intensity graph from 0 to 0.8, Linger 2.

A Bloom emitter is fired, combined and nested as a Blur emitter is. The Blur page describes that shared behaviour in full. This page gives the rows.

At a glance


Made from	A BloomEffect
One particle is	One bloom
Emit count starts at	1
Modes	Emit and Animate
Sections	Emission, Appearance, Events, Advanced
Not present	Spawn, Motion and Link. A bloom has no place in the world.

The Emit count starts at 1. A new Bloom emitter plays once at the first press of the Emit button.

Transform

Transform switches the original BloomEffect off. It keeps the effect’s Intensity, Size and Threshold as level graphs.

The original stays off. Each emit makes a duplicate, switches it on, and removes it when its life ends. See What an emit does.

Emission

Row	Kind	Starts at	Unit	What it does
Mode	List	`Emit`		Emit or Animate. See Emit against Animate.
Loop	Switch	Off		Shown in Animate mode. Repeats the cycle until switched off. Switching it on starts a cycle at once.
Enabled	Switch	Off		Shown in Emit mode. Makes blooms at the Rate until switched off.
Rate	Number	10	Blooms per second	How many blooms are made each second while Enabled is on, or during a Duration.
Lifetime	Two numbers	1	Seconds	How long each bloom lasts. Each picks a value between the two.
Linger	Number	0	Seconds	After its life ends, the bloom stays at its last values for this long.
Timescale	Graph	1		The speed of the bloom’s own clock.

The Rate row stays on show in Animate mode. Animate mode does not use it.

Emission and the HUD describes the shared rows in full.

Appearance

Row	Kind	Starts at	What it does
Intensity	Graph	The BloomEffect’s own Intensity	The strength of the glow, over the life of the bloom.
Size	Graph	The BloomEffect’s own Size	How far the glow spreads, over the life of the bloom.
Threshold	Graph	The BloomEffect’s own Threshold	The brightness cut-off of the glow, over the life of the bloom.

The box of a graph row takes one number, or two numbers as lo, hi. Two numbers give each bloom one value between them for its whole life. The ⋯ button opens the graph editor.

On all three rows a keypoint below 0 is kept as 0. A random spread larger than the value is cut down to the value.

The plugin sets no upper limit on the three rows. Roblox applies its own.

The three graphs are read in steps, Anim. Steps times over one Lifetime. The first value of each graph is set before the bloom is switched on.

Events

The Events section holds On Emit, On Death and On Destruction. There is no On Hit. See Events.

Advanced

Row	Kind	Starts at	What it does
Anim. Steps	Number	100	How many times the graphs are read over one Lifetime. A value of 0 or less is run as 100.
Emit Into	Instance, picked with `*`	None	Where the duplicate is placed. See Where the screen effect is shown.

Advanced describes these rows in full.

Shared with Blur

Subject	On the Blur page
Where the bloom is placed, and who sees it	Where the screen effect is shown
How several blooms combine	Several at once
One bloom in Animate mode, and Loop	Emit against Animate
A Bloom emitter inside another emitter, or fired by an event	Nesting and events

With the tools

Tool	Effect on a Bloom emitter
Size	Multiplies the Size graph.
Time	Multiplies Rate and divides Lifetime.

Size and Time describes both tools.

Limits

No Spawn rows, no Motion rows and no Link.
In a game, one player sees the bloom: the one whose machine fires it.
With Enabled on, blooms overlap and stack. For a steady glow, use Mode Animate with Loop on. That is one bloom.
Each emitted bloom counts as one particle toward the Particle Cap.