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Jan gave very good advice. For multiple planes in one graph, Show[graphics,options] would also be needed. E.g.: Show[ContourPlot3D[x == 2, {x, -5, 5}, {y, -5, 5}, {z, -5, 5}], ContourPlot3D[y == 3, {x, -5, 5}, {y, -5, 5}, {z, -5, 5}], ...
Gianluca: Thank you for your reply. I tried using your suggestion with the following result: ![Linear Combination Corrected][1] [1]:...
Henrik: Thank you for your solution to my elementary coding problem. Having reviewed your "staff picks" item: "Convert 2D into a 3D object: radiotherapy treatment planning system", it becomes clear that coding at that level can result in compact...