Hi, FYI - here is an explanation of the different composition modes: http://doc.qt.digia.com/qq/qq17-compositionmodes.html
These are different from blend modes and I think it would be very useful if they could be exposed to the user. But it would have to be done on a symbol level and not on the layer level. Or at least as an option to choose from. On a similar issue it would be nice if the background (rectangle or stronger stroke) of a text can hide paint in other layers - with the goal to make better readable text labels - in german language we call that a "Textfreistellung" - I don't know the correct english term, sorry. Hugo Mercier from Oslandia already looked into the issue a bit and prepared a proposal. This may be solved with the composition modes as well. So I would definitely like to see the exposure of the different composition modes exposed to the user on a symbol level level. Thanks for bringing up the issue, Andreas Am 27.08.2014 15:05, schrieb Jürgen E. Fischer: > Hi Andrea, > > On Wed, 27. Aug 2014 at 16:20:14 +0200, Andrea Peri wrote: >> Your solution is not always good. You should could use the level >> symbols to give what symbol won in overlap. > > I'm already using symbol levels. Is there a way to have > transparency in higher levels remove earlier rendered stuff on > lower levels? > > Level 2 - .. - Level 1 -.-.-. > > Should look like > > - .. - > > if there are level 1 & 2 boundaries on top of each other and not > like > > -...-- > > Still the transparent bits should not cover (vector/raster) layers > below. Putting a fully transparent line on the bottom of each > level and rendering it in source composition mode would achieve > that (ie. the transparent bits of the higher level would make > everything rendered in lower levels transparent again instead of > leaving it as is). > > > Jürgen > > > > _______________________________________________ Qgis-developer > mailing list Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer > _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer