[Qgis-user] Blending layers question

[Matt Boyd]

Thanks Nicolas,
yes, I'm aware of those properties. What I'm trying to work out is how QGIS
does this so I can use it outside of QGIS in another program. Some pointers
to the sort of questions I should be asking google on transparency would be
handy.

Thanks

On Thu, Sep 10, 2015 at 10:33 AM, Nicolas Cadieux <
nicolas.cadieux at archeotec.ca> wrote:

> Hi,
>
> In your raster properties, you can render layers using various methods
> like add, multiply...  It works very well.  Same options are available for
> vector layer and objects.
>
> Nicolas Cadieux M.Sc.
> Les Entreprises Archéotec inc.
> 8548, rue Saint-Denis Montréal H2P 2H2
> Téléphone: 514.381.5112  Fax: 514.381.4995
> www.archeotec.ca
> On Sep 9, 2015 7:51 PM, "Matt Boyd [via OSGeo.org]" <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=5223435&i=0>> wrote:
>
> Hi Group,
> this is possibly one of those questions about a question. I'd like to
> create some blended layers that look the same as layers in QGIS with
> transparency applied.
> I've another application that my data lives in and they supply a
> calculator that's able to do some fairly reasonable maths on different
> grids and other types of data.
>
> How does QGIS do transparency, and can I use those equations / method
> elsewhere.
>
> Thanks
> Matt
>
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