Hi, in optical transformation, I was trying to draw the transformed coordinate figures (for concentrator and cloak) as in doi:10.1016/j.photonics.2007.07.013,. I tried with comsol 4.4, I was able to visualise it, but the diagram was not as similar as to that of given in this article. Is there any user friendly software, that would help me in drawing those figures..?

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