I am trying to change the facecolor. Part of the issue is that I have a limited understanding of the various backends to Plots.jl . The same issue was raised here at various occasions. I continue to struggle.
x = [0, 1, 2, 0]
y = [0, 0, 1, 2]
z = [0, 0, 0, 0]
i = [0]
j = [1]
k = [2]
mesh3d(x, y, z; connections = (i, j, k),facecolor=RGB(1.,0.,0.))