Artefacts in non Level 0 layers (mirax)

[Stefan König]

Hello,

i'm using OpenSlide to read some Mirax files from disk. If i zoom out
to layer 1 or 2 i get some artefacts inside the region.

the same region in layer0 is without any kind of artefacts and interferences.

i uploaded 2 images to illustrate the problem:

http://www.abload.de/image.php?img=layer09gvh.jpg (layer0)
http://www.abload.de/image.php?img=artefactsuhtx.jpg (same region in layer1)

someone a idea how to fix it?

 kind regards