Hi Chris and others,
Following the generate mipmap+texture compression procedure on the
conformance page
http://www.openscenegraph.org/osgwiki/pmwiki.php/Tasks/OpenGLConformance
I got different results with the optimizer set to default and off. I
suspect something has changed in OSG because when I converted a file
to .osg the texture "file" keyword was missing when optimizations was
set to default.
This is proably the setting in osg::Texture to unref images once they've been downloaded to OpenGL, these saves on memory, but does mean that once optimized and download to OpenGL the image is gone so when you write the scene graph it doesn't have any handle to the original file that it was associated with.
Robert.
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