Member Qwt3DPlot::savePixmap (QString const &fileName, QString const &format): Use Qwt3DPlot::save or Qwt3DIO::save instead.
Member QwtPlotCurve::FilterPointsAggressive: Superseded by FilterPointsAdaptive: reducing each chunk to integer first/min/max/last quadruples produces 1px staircase artifacts for oversampled smooth curves. Kept for compatibility for at least one version cycle.
Member QwtPlotCurve::FilterPointsPixel: Superseded by FilterPointsAdaptive: the min/max envelope per pixel column discards the sample order and shape, producing ( milder ) staircase artifacts of the same family as FilterPointsAggressive for oversampled smooth curves. Kept for compatibility for at least one version cycle.