Laser Particles

mxt:laser is a glowing particle column that only extends along the world Y axis. It is drawn by the particle system rather than an entity, so it can be used directly with /particle, ParticleEffect, and other paths that send ParticleOptions.

Quick test

This command creates a default pale-yellow, upward-flowing laser that is eight blocks tall and lasts 40 ticks:

/particle mxt:laser{y_max:8.0f} ~ ~ ~ 0 0 0 0 1 force

A blue laser flowing downward:

/particle mxt:laser{color:"#FF79BFFF",y_min:-2.0f,y_max:6.0f,width:0.24f,flow_direction:"down",flow_speed:1.8f,lifetime:200} ~ ~ ~ 0 0 0 0 1 force

Fields

Field	Default	Meaning
color	#FFFFE8A8	ARGB colour. The highest byte is the overall alpha.
x / z	0 / 0	Horizontal offset from the particle spawn point.
y_min / y_max	0 / 8	Vertical range relative to the particle spawn point; y_max must be greater than y_min.
width	0.18	Diameter of the bright core; the halo expands by fixed factors.
flow_direction	"up"	Surface-flow direction, either "up" or "down".
flow_speed	1	Surface-flow speed; it cannot be negative.
lifetime	40	Particle lifetime in ticks.

color uses an ARGB string, for example #CCFFF0A0 is about 80% opaque. The laser uses full-bright lighting, so its colour and halo remain visible in shadow.