Pcolor figure quality (not an exporting problem)

I have a pcolor figure which changes quality drastically depending on whether I have a particular element visible or not. The good figure has an array of small dots (basically just using hdl = plot(x,y,'r.')) overlaid on top of the pcolor image at each of the "grid points". I don't always want to see those dots but when I set the dots to be invisible (set(hdl,'visible','off') the quality of the whole figure looks terrible: bad figure.

I can restore the quality by just making those grid points visible again, but I don't always want them. Does anyone have any suggestions?

Thanks

Answer 1

[Walter Roberson]

Hmmm... could I ask you to check

get(gcf, 'Renderer')

in each of the two cases, the dots visible or not?

[Bradford]

You're a genius Walter, Thanks!

for some reason when I remove the dots it *sometimes* changes from the zbuffer to OpenGL renderer. Just setting it back to zbuffer fixes it (should have known based on my exporting issues)

Thanks!

[Walter Roberson]

I'd be curious about whether using

opengl software

would also solve the problem. If it does, then it would help to know which MATLAB release and OS you are using, 32 or 64 bit MATLAB, and also which graphics card you are using.