# filters var (atom)

Source: https://ref.dm-lang.org/atom/var/filters
Added in BYOND 512.

### Default value
> empty list

This var is a list of graphical filters to use for post-processing effects, applied in order. You can assign this value a list, an individual filter, or null to empty it.

```dm
obj/blurry
    filters = filter(type="blur", size=1)
```

Atoms with the `KEEP_TOGETHER` flag will apply their filters after the composite image has been drawn. Filters will also apply to any maptext the atom has.

See the [filters](https://ref.dm-lang.org/notes/filters/index.md) section for more information on individual filters.

## Named Filters

Filters can be created with a `name` argument. That name can be used to access the filter in the list (e.g. `filters["drunk_blur"]` instead of using a numeric index, which is helpful for managing animations and updating multiple filters on an object.

Adding a new filter with the same name as an existing filter will remove the old one, since only one of a given filter name can be used on an appearance at a time.

You can also remove a named filter from the list simply by subtracting the name instead of the filter itself. That is, `filters -= filters["foo"]` and `filters -= "foo"` do the same thing.

### See also
- [appearance_flags var (atom)](https://ref.dm-lang.org/atom/var/appearance_flags.md)
- [filter proc](https://ref.dm-lang.org/proc/filter.md)
- [animate proc](https://ref.dm-lang.org/proc/animate.md)
- [Filter effects](https://ref.dm-lang.org/notes/filters/index.md)