raster
  The opacity at which the image will be drawn.
Use static method RasterLayer.defaultRasterOpacity to set the default property.
Parameters
raster
value of rasterOpacity
The opacity at which the image will be drawn.
Use static method RasterLayer.defaultRasterOpacityAsExpression to set the default property.
Parameters
raster
value of rasterOpacity as Expression
The opacity at which the image will be drawn.