Recently upgrade to VTK 9.3 from VTK 8.2. Found a strange issue on rendering lines. When zoom out too much the line will “disconnect” and almost looks like dotted line.
In vtk 8.2, no matter how much I zoom out it will always be normal.
A slice of an stl object looks strange as well.
Zoomed in a bit more:
In rare cases, it will show very fainted lines:
Found two very similar issues: Markups Line discontinuities - Support - 3D Slicer Community Upgrade vtk.js， Line rendering is inconsistent · Issue #2386 · Kitware/vtk-js · GitHub
Not sure what’s the solution here.
Perhaps try to turn on multisample anti-aliasing? I think it is discussed here.
Thanks! Using renderWindow->SetMultiSamples(X); actually fixed this issue.
However, I still think this is a potential bug, might be related to the pixel count. Even without anti-aliasing, there should not be any disconnection in the object outlines.