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I don’t think this is related to width of column. I suspect you are experiencing this problem instead.
Troubleshooting Glitches and Flickering in DirectX
Some users report glitches and flickering when using the DirectX hardware renderer. The first thing we suggest is that people upgrade their graphics drivers as out of date Graphics drivers can be a cause of glitches in our Direct3D10RenderSurface.
SciChart uses the Microsoft class D3DImage to composite (mix) DirectX10/11 content with WPF. On some older graphics hardware, the D3DImage implementation is buggy and can cause dropped frames or glitching.
To resolve this, we have an alternative method to composite DirectX10/11 with WPF. This is much more reliable, but it is also slower leading to a slight (usually not noticeable) slowdown in refresh rate. To enable the alternative composition, please set the static property Direct3D10RenderSurface.UseAlternativeFillSource somewhere in your code:
// Disables hardware accelerated composition of DirectX with WPF // Slightly slower refresh rate but resolves rare issues with dropped frames or glitching // on some graphics hardware Direct3D10RenderSurface.UseAlternativeFillSource = true;
Please let me know if my hunch is correct.
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