I have a QGIS project with three raster layers:

  1. SRTM GeoTiff (blending mode: SOFT LIGHT; color ramp: Viridis)
  2. Google Terrain (blending mode normal)
  3. Google Satellite (blending mode normal)

The problem is: if I display ONLY layer 1, nothing is visible, because it has nothing below to "blend with".

So my question is: is there a way to create a "solid color" layer, so that an upper layer with blending mode different than "normal" (and particularly with "soft light") can be visible somehow?

If I hide layer 2, I have the following result:

enter image description here

And if I display only layers 1 and 2 (layer 3 might be one or off), this is the result:

enter image description here

  • Perhaps the Create constant raster layer tool will help. Tool description: "Given an input raster layer and a value, this algorithm generates a new layer with the same extent and cell size as the input one, and all cells with the specified value."
    – csk
    May 9, 2018 at 18:53
  • @csk Sounds interesting. How would I do that? Is there a menu? May 9, 2018 at 19:05
  • 1
    You can find this tool in the processing toolbox (Processing menu > Toolbox > Raster tools)
    – csk
    May 9, 2018 at 19:28

1 Answer 1


I usually just make a polygon layer containing a single feature covering the whole mapped area to achieve this, and style it with a simple fill of the desired colour.

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