# PRIM_REFLECTION_PROBE_MIRROR

*LSL constant*

```lsl
integer PRIM_REFLECTION_PROBE_MIRROR = 4;
```

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

Used with [PRIM_REFLECTION_PROBE](/constants/PRIM_REFLECTION_PROBE/). When enabled, objects with low-roughness PBR materials objects act as a mirror. Note that mirrors do not reflect avatars unless [PRIM_REFLECTION_PROBE_DYNAMIC](/constants/PRIM_REFLECTION_PROBE_DYNAMIC/) is also set. Rendering mirrors has a performance cost.

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