MATLAB: Does the object disappear when I change the figure renderer to Zbuffer

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When I change my figure renderer to Zbuffer, some of my objects (such as text that I have added) disappear.

Best Answer

The Zbuffer draws each pixel based on the depth (z value) of the objects that would project onto that pixel. If your object's z position is outside of the z axis limits, the object will not be rendered. Change your z axis limits to make sure all your objects are rendered by setting the Zlim property as follows:

set(gca, 'zlim', [zMin zMax]

where zMin and zMax represent the minimum and maximum Z axis limits.

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MATLAB: Does the “alpha” function make the left and bottom borders of the figure disappear in MATLAB

This is due to a bug when using transparency in MATLAB. OpenGL does not render the borders correctly.

This issue occurs when a plot with some transparency has its edges overlapping with the edge of the figure.

Possible Workaround on Mac:

Increase the axes offset by a small value depending on the scale of your figure. For example:

       figure
       area(0:10,0:10)
       box on
       alpha(0.2)
       set(gca,'xlim',[0 10.001])
       set(gca,'ylim',[-0.001 10])

Possible workaround on Windows and Linux:

1. OpenGL is the renderer that MATLAB uses to handle transparency. By default, OpenGL runs in hardware acceleration mode to increase performance. Use OpenGL in software mode instead:

       >> opengl software

Make sure to run this command before opening a new figure.

2. Once OpenGL is set to run in software mode, slightly increase the x-axis limit to make the right border reappear:

       figure
       area(1:10,1:10)
       box on
       alpha(0.2)
       xlim([1 10.001])

This should also fix issues with the borders of the legend box.

MATLAB: Transparent plane over on object

I can think of two possible problems. If you're plotting the object after plotting the plane, the plane will disappear if you don't use the hold on command before plotting the object. The other possible issue is the figure renderer. Try each of the following:

set(gcf,'renderer','opengl')

If that doesn't work, try

set(gcf,'renderer','zbuffer')

and if that doesn't work try

set(gcf,'renderer','painters')

Hope this helps.

Best Answer

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MATLAB: Does the “alpha” function make the left and bottom borders of the figure disappear in MATLAB

MATLAB: Transparent plane over on object

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