# PSYS_SRC_PATTERN_DROP

*LSL constant*

```lsl
integer PSYS_SRC_PATTERN_DROP = 0x01;
```

Emission pattern that drops particles at the source position with no initial velocity. Overrides burst radius, minimum speed, and maximum speed settings to 0.0.

Constant groups: [ParticleSourcePattern](/constants/groups/ParticleSourcePattern/)

:::note[Documentation]
This entry is documented in the LSL definitions. No matching wiki article is present in this local collection. Its inclusion here does not establish availability on every simulator.
:::

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From lsl.dev: https://lsl.dev/constants/PSYS_SRC_PATTERN_DROP/