Is it possible to generate a 3D iso-surface plot in plotly through its web app or the python api given a data set for a scalar variable f(x,y,z) over a regular x,y,z rectangular grid? (e.g. a temperature field in a 3D grid).
Not at the moment unfortunately. Adding support for iso-surface is on our short-term roadmap though.
At the moment, plotly surfaces have f(x,y,z) = z.
OK, thanks for that update Etienne. When you say it’s on your short term roadmap, do you mean within say a couple of months?
I’m not sure I understand what you meant by f(z,y,z) = z. Did you mean f(x,y) = z ?
I meant f(x, y, z) with f being the color value.
OK, thanks Etienne.
So, any guesses on when iso-surfaces will be implemented in Plotly?
Don’t worry, I won’t hold you to your prediction! 
My guess best guess would be sometime this spring.