In addition it seems like the thicker the custom dashed line is, the
more ugly rendering artefacts appear at the change between a dash and a
space. 

Is this a qt bug or a QGIS bug? 

Andreas 

On 2017-01-09 14:36, Neumann, Andreas wrote:

> Hi, 
> 
> My colleague experimented with custom dash patterns inside a line pattern 
> fill. We discovered that this feature is seriously broken, both in 2x and 3x. 
> Both on Windows and Linux. 
> 
> We made sure that the cap style is set to "flat" and then applied a custom 
> dash pattern inside a line pattern fill, with equal length (say 3mm length 
> dash, 3mm length space). The result as it appears is more like a longer dash, 
> then a space, then a shorter dash and a space. Certainly not what we defined. 
> If you change to a longer dash, say 20mm dash, 3mm space, the spaces totally 
> disappear. 
> 
> Is there maybe a unit problem when rendering custom dashes inside a line 
> pattern? It looks like the total length of the custom dash pattern doesn't 
> equal the sum of the individual dash/space patterns. 
> 
> Can others confirm my issue? 
> 
> Thanks, 
> 
> Andreas
> 
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