The flavor may also contain a mild wheat graininess noticeable in the background. Higher sensitivity creates issues with graininess. This reduced graininess typically improves the photographic appearance of blue skies and some flesh tones. CcMmYK colorants reduce graininess in the middle tone region. Welles decided to superimpose snow falling to mask the graininess in these shots. Nykvist used Eastmancolor film, which reduced graininess and would be the most sensitive to colours.