How can I draw the three intersection circles/ellipse with that shading paradigm (not necessarily the same colors) effectively? It appears that the original image doesn't have overlapping colors ...
I'm using the 3d library to put a circle on the z=0 plane, and other things. I'd like to fade this circle radially, but the result isn't as I would expect because the fading is not proportional to the ...
In other words, is it a bug if lualatex cannot compile a document that pdflatex can? Based on the answers to this question How to expand TeX's "main memory size"? (pgfplots memory ...