<div dir="ltr">Ah, ok, so FXAA *is* working then, and not broken.<br><br>FXAA (Fast approXimate Anti-Aliasing) is an approximate anti-aliasing technique that is applied as a post-processing step. Since it is approximate and operates in screen space, there are some scenes that it works well on, and others that it doesn't. It sounds like you've found one that it doesn't handle -- those thin, clustered lines just look like random noise and not edges to a screen-space algorithm, so it doesn't know what to do with them.<br><br>If you want higher quality anti-aliasing, you'll want MSAA (vtkRenderer::SetMultiSamples) or SSAA. MSAA is generally preferred and better tested.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 7, 2019 at 5:07 PM chung <<a href="mailto:chung@navatekltd.com">chung@navatekltd.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Yes I do see a noticeable difference in the FXAAFilter test as well as in my<br>
own test widget.<br>
<br>
<<a href="http://vtk.1045678.n5.nabble.com/file/t342714/vtkFXAA.png" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.com/file/t342714/vtkFXAA.png</a>> <br>
<br>
<br>
<<a href="http://vtk.1045678.n5.nabble.com/file/t342714/myFXAA.png" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.com/file/t342714/myFXAA.png</a>> <br>
<<a href="http://vtk.1045678.n5.nabble.com/file/t342714/myFXAA2.png" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.com/file/t342714/myFXAA2.png</a>> <br>
I can see that the FXAA algorithm is affecting the grid lines at certain<br>
angles but they aren't as smooth as I'd like them to be.<br>
<br>
<br>
I stepped through the code and the grid was rendered in the opaque pass as<br>
vtkRenderer::UpdateOpaquePolygonalGeometry returns 1.<br>
<br>
<br>
Thanks again Allie for looking into this.<br>
<br>
Sincerely,<br>
Chuan<br>
<br>
<br>
<br>
--<br>
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