Raster Image opacity
See the discussion !78 (comment 1442438449). The image can have an opacity but these are stored before the raster data. Still, the style should be added to the raster image.
Possible Implementation:
Currently, all the colors are tracked by a Style strategy. This strategy can check whether it is on a path or on a raster image. Depending on where the f (or other render commands) close the shape (raster, path) the appropriate styling can be added.
Edited by Nicco Kunzmann