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Maniphest T32169

Artifacts on the outline of a vector motion blurred object
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Description

Not sure this is a bug or simply a limit of the vector blur, btw I'm posting it just in case:
The outline of the moving object is jagged (pixeled?) by the vector blur, see the attached image (and blend).

Ubuntu 10.10 64 bit, r49166.

Event Timeline

Enrico Valenza (env) edited a custom field.Jul 24 2012, 12:51 PM
Enrico Valenza (env) attached 1 file(s): F18262: vectblur.blend.
Enrico Valenza (env) attached 1 file(s): F18263: vectblur.png.
marc chambon (ruddy) added a comment.Jul 25 2012, 8:26 PM

Confirmed

rev49214, no optimizations
xubuntu 12.04
pentium M 1.7 GHz
2 Gb RAM
ati 9600 (open source drivers)

Sergey Sharybin (sergey) added a comment.Aug 2 2012, 12:50 PM

You should either render sky on a separate layer or enable FSA.

Not a bug, just how vector blur works.

Sergey Sharybin (sergey) changed the task status from Unknown Status to Archived.Aug 2 2012, 12:50 PM
Enrico Valenza (env) attached 1 file(s): F18269: vectblur2.png.Aug 2 2012, 3:40 PM

Right, thanks.
Btw, I attached a new image showing that, with "Full Sample" enabled, the render is correct in the render output but still jagged in the viewer.

Sergey Sharybin (sergey) added a comment.Aug 3 2012, 11:58 AM

When compositor is calculating image for interactive interaction it's not doing FSA filtering and only using single buffer for all calculations, that's why viewer node is still looking crappy. In theory compositor could do FSA too, but it'll make calculation several times slower.

Enrico Valenza (env) added a comment.Aug 3 2012, 1:16 PM

Perfect. Thanks again.