I believe this is happening because by default gradient in mountain series is drawn from 0 and for log axis log(0) is undefined so gradient can’t be drawn in this case. You can workaround this limitation by assigning ZeroLine which is greater than 0:
final FastMountainRenderableSeries rSeries = sciChartBuilder.newMountainSeries() .withDataSeries(dataSeries) .withStrokeStyle(0xAAFFC9A8, 1f, true) .withAreaFillLinearGradientColors(0xAAFF8D42, 0x88090E11) .withZeroLine(0.001) // set zero line = 0.01 so fill can be drawn correctly for log Y axis .build();
Can you try it?
Hope this will help you
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