An update: http://www.highcharts.com/plugin-registry/single/35/contour is compatible with Highcharts releases now

This is a very important core chart type supported by Excel and others

@Kumaresan Muthaliar Can you provide a JSFiddle? I haven't used categories so that could very well be broken.

@Ben Brian: I am using the Paula Costa plugin. But if i use string categories to z axis, then it doesn't work.

Paulo Costa made a plugin that implements 3D surface charts, if you look at the 3rd example on this list: http://www.highcharts.com/plugin-registry/single/35/contour -- with different data it can produce very impressive results! See this demo I made to show the capability: http://jsfiddle.net/L5y8yrvr/9/

But it doesn't work with official Highcharts releases yet and there are some bugs. I think the dev team should consider integrating Paulo's work into the main repo. This is an impressive, some would say essential, option to have in a graphing package.

Even just 3d lines would be a huge step forward. I can use the 3d polygons referred to elsewhere and make a 3d surface, but without the concept of lines that have a width in pixels that is not tied to the ratios of the chart dimensions, it's not worth much; the lines add so much clarity.

Having 3D surface charts is what will make my company decide which graphing software to buy. We forecast yield curves and plotting the results on a 3D surface chart is industry standard.

This is required for what we need to do as a business, and it would be extremely helpful to have it already implemented in HighCharts instead of using a separate implementation!

This would be very useful

I need this chart !!

Same as above, needed for visualization of e.g. skews and volatility surfaces in financial domain.

For my customers, I need a chart like this

http://www.google.fr/imgres?um=1&rlz=1C1GTPM_frFR526FR526&hl=fr&biw=1920&bih=955&tbm=isch&tbnid=YV6reH3HdHPCkM:&imgrefurl=http://www.datapresentation.com/products/EZ-Chart.cfm&docid=caZ9sR5WjJif2M&imgurl=http://www.datapresentation.com/graphics/Chart_Data_And_Embedded_Chart_4.gif&w=584&h=478&ei=RCEeUrousJfRBYu2gNAG&zoom=1&iact=hc&vpx=12&vpy=455&dur=793&hovh=186&hovw=227&tx=129&ty=62&page=1&tbnh=140&tbnw=171&start=0&ndsp=50&ved=1t:429,r:40,s:0,i:205

Strongly recommend High-charts supporting curve surface.Really useful.

We really need this kind of charts, it would be very useful to represent financial greeks (http://en.wikipedia.org/wiki/Greeks_(finance))

3d surface charts or point clouds would be extremely helpful! This would be really helpful in the RSM (Response Surface Modeling) that we're looking to do:
http://www.noesissolutions.com/Noesis/design-optimization/explore/response-surface-0

This would be a very useful chart type to implement. Far more important than '3D pie charts' :)

also see here: http://www.grvisualisation.50webs.com/javascript_surface_plot.html

(pure javascript 3d surface charts)

badly needed for financial markets usage