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plot in requested ranges cont4?

The problem is, that what I’m trying to plot… looks ugly when using cont (not cont4). Is there a way, even a more complicated one, to plot in requested ranges cont4?

I guess one way is to create TH2 from TGraph2D using Interpolate, but I have no idea how to compute proper interpolation points to make created TH2 look same as TGraph2D after drawing with cont4.

Can you provide a small example showing your problem ? often using the option COL is a better option.