See also bug #56979 and bug #54554 for references.

@HG200: Yes, this is a general issue that just happens to be prominent when displaying streamlines. For the grid lines turning opaque when "graphicssmoothing" is turned "off", I just posted a bug report (bug #57343).

I have attached a picture. Solves the problem for the line but the grid becomes solid. Can you please show a picture what it looks like at your side with and without anti-aliasing including the grid?

I am asking this question in relation to the discussion going on in patch #9859 (streamline implementation). If this is a driver / OpenGL issue in general and the plot looks okay (=soft grid, solid line) if the drivers are okay i would treat the streamline problem as solved.

Thanks in advance

Hello,

when the line() command is called with more and more points, the plot output becomes more and more transparent. The attached picture shows the behaviour of the following MWE for N = 20000 and N = 1000.

N = 20000;
r = linspace (1, 50, N);
phi = linspace (0, 20*2*pi(), N);
x = r.*cos (phi);
y = r.*sin (phi);
z = 20*sin (phi);
line ("xdata", x, "ydata", y, "zdata", z, "color", "r");
axis equal;
view (3);

hg summary
parent: 27680:f998e243fa78
branch: stable

Note: This topic is also related to the function streamline. The streamline plot becomes faint if the integrator step size is set very small.