Constant radiant_rs::blendmodes::SCREEN_MASK

pub const SCREEN_MASK: BlendMode = BlendMode{color:
              BlendingFunction::Addition{source: LinearBlendingFactor::One,
                                         destination:
                                             LinearBlendingFactor::OneMinusSourceColor,},
          alpha:
              BlendingFunction::Addition{source: LinearBlendingFactor::One,
                                         destination:
                                             LinearBlendingFactor::OneMinusSourceAlpha,},
          constant_value: Color(0.0, 0.0, 0.0, 0.0),}

Overlays source and destination, masking the destination where source alpha is low.