[xcrysden] Convert xsf to povray for plotting the isosurface.

[Hongyi Zhao]

Hi,

The following image:
https://github.com/hongyi-zhao/test/blob/master/AsGa_MLWF/gaas_00001.png
is created by xcrysden with the following file:
https://github.com/hongyi-zhao/test/blob/master/AsGa_MLWF/gaas_00001.xsf

The method and parameter used here are as follows:
in the Tools --> Data Grid section:
Xcrysden: Tools --> Data Grid
Degree of triCubic Spline = 3; Isovalue = 0.95; Render +/- isovalue = yes

But I want to render the output with povray for further image quality
enhancement. Any hints for this job?
-- 
Hongyi Zhao <hongyi.zhao at gmail.com>