[Qgis-user] Composer and transparency

[Pedro Venâncio]

Hi Cascafico,

I have also a problem with Composer on QGIS 1.8. When I use rasters with transparency along with other layers, some horizontal stripes appear without transparency.

Normally I make the union of MDT with Shaded Relief. To combine the MDT with the Shaded Relief, I use the r.his function, placing the MDT as HUE and Shaded Relief as Intensity, resulting in a set of three rasters corresponding to the three RGB channels. Then I use r.composite to create the final RGB image.


Best regards,
Pedro Venâncio


________________________________
From: Cascafico Giovanni <cascafico at gmail.com>
To: qgis-user at lists.osgeo.org 
Sent: Monday, March 4, 2013 10:46 AM
Subject: [Qgis-user] Composer and transparency


Hello valuable list!
Qgis composer has a known bug in managing raster layers with  transparency.
So I need a workaround to merge rgb relief with single band DEM.
Is there a pret-a-porter expression for raster calculator?
Or I need to convert rgb to hsv before? If so,  how?
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