[Marble-devel] Re: Texture quality

bbeschow at cs.tu-berlin.de bbeschow at cs.tu-berlin.de
Tue Jun 21 16:02:50 CEST 2011

Hello Helmut,

>> My customer complains about a worsening of the texture quality and I can
>> verify this. If I view the schagen map from a height of 2756.7 km the
>> old
>> version has a much better quality. I can provide screen-dumps if you
>> cannot reproduce this effect.
> Yes I can confirm this effect: for a few zoomlevels the point where
> Marble switches between zoomlevels doesn't seem to be optimal.
> Bernhard: Could this be related to the latest changes with "sharp"
> discrete mercator display?

I rather think it's related to the following commit, where the tile
selection logic was modified to take the number of base tiles into


Meanwhile, the code has moved to TextureLayer::paintGlobe().

> Just a thought: Is it currently possible to "tweak" the zoom level change
> via
> the dgml files?

I currently can't imagine a way to tweak a dgml file. However, it should
be possible to tweak the tile level selection logic to choose a higher
tile level.

Helmut, would that help you?


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