Hi all,

it appears that I've got this one cornered:  when I turn off texture compression
(SGSceneFeatures::setTextureCompression) everything works as advertised.

It looks like there may be a bug in either the 10.4.x/nvidia OpenGL driver or in
OSG handling of texture compression - I suspect the former. Only RGB textures
are compressed properly.

I'm taking this over to osg-devel and/or mac-opengl.

Thanks for the assistance.
Cheers,
/ulrich

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