Bug report #10166
Anti-aliasing leads to visible borders even if borders have "no pen"
|Affected QGIS version:||2.2.0||Regression?:||No|
|Operating System:||Linux||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||18620|
The option "Options -> Rendering -> Rendering Quality: Make lines appear less jagged at the expense of some drawing performance" leads to unwanted visual artifacts when drawing polygons with no borders.
1. Have some polygons with adjacent/shared borders, eg from a Delaunay/Voronoi.
2. Set "Border style" to "No pen".
3. Set "Options -> Rendering -> Rendering Quality: Make lines appear less jagged at the expense of some drawing performance" to true by ticking the box. If it is ticked, the borders will appear in the color of the background as visible lines. If the option is unticked, there will be no visible borders as intended. See the attached image for an example.
I am on Linux using binary nvidia drivers.
QGIS version 2.3.0-Master
QGIS code revision eacb5bd
Compiled against Qt 4.8.6
Running against Qt 4.8.6
QWT Version 6.1.0
QScintilla2 Version 2.8.1