qgis/Quantum-GIS — pull request #52 by brushtyler (2011-10-19 12:28:22+00:00)
Title: Handle raster layer's transparency band while rendering (fix #2491)

This patch allow to set a transparency band for raster layers from Layer -> Property ->Transparency. The combobox to select the transparency band was present yet, but it was disabled because not implemented yet.

Of course I tried it and it works well, but further tests are welcome for this kind of rendering related stuff.
I also think this commit should be backported, that grayed combobox is very annoying for users.