Bug introduced in 12.0.0
I'm having some problems with
ListDensityPlot in Mathematica 12 on MacOS Mojave.
Here is the code:
test = Import["https://www.dropbox.com/s/0ypdo4pdh9q86j5/test.csv?dl=1"]; ListDensityPlot[test, PlotRange -> All, InterpolationOrder -> 0]
(data can be found here: https://www.dropbox.com/s/0ypdo4pdh9q86j5/test.csv?dl=0)
Output in MMA11.3
Output in MMA 12
In v12 there are a lot of unwanted triangles in the plot. Any idea of what the problem might be?
EDIT: I forgot to mention that the problem "disappears" with any value different than 0 assigned to InterpolationOrder.
EDIT 2: It actually seems to be a genuine bug, so I added the bugs tag and reported to mathematica support.