# screen-effects.param-refused

> Talos next · Since next

a `ctx.screenEffects.setParam` write is not drawn: the scene runs no such effect (or it did not build), its shader declares no such param, or the value is not the param's type or is outside its `[min, max]`; once per effect and param

| | |
|---|---|
| Severity | `warning` |

## Meaning

a `ctx.screenEffects.setParam` write is not drawn: the scene runs no such effect (or it did not build), its shader declares no such param, or the value is not the param's type or is outside its `[min, max]`; once per effect and param

## Fix

name an effect and a `//! param` the scene runs, with a value its header takes