[OpenLayers-Users] strange artefacts in overlay layer (mapserver)

[Christopher Schmidt]

On Wed, Sep 10, 2008 at 06:12:12AM -0700, BrainDrain wrote:
> 
> I have 2 mapserver layers in my map:
> 1st (transparent:false):
> isBaseLayer:true,alpha:false,singleTile:false,transitionEffect:'resize',buffer:0,gutter:16
> 2nd: (overlay,transparent:true):
> isBaseLayer:false,alpha:false/true,singleTile:false,transitionEffect:'resize',buffer:0,gutter:0
>  and I have square artefacts (image tone or opacity/transparency changes)

Looks to me like you're using 256 color dithering without a fixed color
palette set, which means that your tiles are all going to have the
'ideal' colorset based on the rendering backend, and between tiles these
can differ depending on the data included in the tile. 

> while paning/zooming map:
> IE example:
> http://www.nabble.com/file/p19413291/ie.jpg 
> and after scrolling down:
> http://www.nabble.com/file/p19413291/ie2.jpg 
> k-meleon(gecko):
> http://www.nabble.com/file/p19413291/k-meleon.jpg 
> need help
> 
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> 
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-- 
Christopher Schmidt
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