[Qgis-user] Raster layer opacity expression - how does it work?

[Ujaval Gandhi]

You can also try the “Mask” plugin for more control.
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On Mon, 6 Dec 2021 at 7:43 PM, DelazJ <delazj at gmail.com> wrote:

> Hi,
> And here's the feature in the changelog (
> https://qgis.org/en/site/forusers/visualchangelog322/index.html#feature-data-defined-raster-layer-opacity);
> afaict, it affects the whole layer and not pixel by pixel.
>
> On a kind-of "off topic" request, I'd also be interested to see examples
> of expressions playing with raster functions.
>
> Regards,
> Harrissou
>
> Le lun. 6 déc. 2021 à 13:32, Johannes Kröger (WhereGroup) <
> johannes.kroeger at wheregroup.com> a écrit :
>
>> Anything that you can do with expressions, in this case to get a number
>> between 0 and 100, but it will always affect the whole layer globally.
>> You can not set a different opacity for different regions. For this,
>> approaches like Ujaval's suggestion are probably the best way.
>>
>> Cheers
>> Hannes
>>
>> > I'd still really like to know what can be done using an expression for
>> > the Global Opacity of a raster layer.
>>
>> --
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