# Using custom ticks with RegionPlot3D

I'm trying to change to plot a sphere using RegionPlot3D and look at how the shape of the sphere changes when you use a logarithmic scale (or any nonlinear scale) for the x, y, and z axes. The code to produce a sphere on linear axes is:

RegionPlot3D[x^2 + y^2 + z^2 < 1, {x, -1, 1}, {y, -1, 1}, {z, -1, 1},
Mesh -> False, PlotPoints -> 90]


This works fine, but I cannot seem to change the axes to a nonlinear scale. The CustomTicks package seems to be a good start, but I cannot seem to make it work for RegionPlot3D.

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• It is not clear how you imagine to take the logarithm of the negative coordinates, say, in terms of x  from -1 to 0? – Alexei Boulbitch Mar 18 '15 at 9:54

 RegionPlot3D[