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How can I disable or enable multi-sampling live while the program is rendering?

I tried this.

    public override void Draw(GameTime gameTime)

        GraphicsDevice.PresentationParameters.MultiSampleCount = 0;

        ... draw stuff ...


But it doesn't disable the multisampling while drawing, because setting "PreferMultiSampling" to true under the presentation parameters when starting the program apparently overwrites this. Or am I wrong?

How can I do this?

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up vote 3 down vote accepted

PresentationParameters tells you the current settings of the GraphicsDevice. It's a readout. You're not supposed to modify it.

You need to change the settings on the GraphicsDeviceManager (see MSDN, the default template creates one called graphics as a member of your Game class), and then call ApplyChanges().

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