Hi Robert,
My team have traced to using hardware generation of mipmaps as the reason
why the compressed texture loads slower than uncompressed texture. We do not
know the exact reason and have reproduced the same behaviour across NVIDIA and
Intel-based GPU on both Linux and Windows system.
Right now, we default to pre-build the mipmaps when we use OSGDEM and this
gives us faster performance than uncompressed texture loading.
Thank you!
Cheers,
Boon
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=58636#58636
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