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Contours levels on 3D surface

Regarding contours plots, it is possible to set ncontours if we want to specify how many levels we want. But when we projects contours on a 3D surface, this option is not available.

Is there any trick to handle this in an other way ?

You’re correct. This option isn’t available at this time.

I just made it an official feature request: https://github.com/plotly/plotly.js/issues/485.

Please subscribe to the ticket for the latest development info.