Hi Vincent, If you don't want lighting to affect your skysphere, you should turn it off.
skysphere->getOrCreateStateSet->setMode( GL_LIGHTING, osg::StateAttribute::OFF ); To make it transparent, you need to enable a blend function, as well as tell OSG to put it in the transparent bin so that it plays nicely with the rest of the scenegraph - something like: skysphere->getOrCreateStateSet->setMode( GL_BLEND, osg::StateAttribute::ON ); skysphere->getOrCreateStateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); (Might be wrong - this was from memory). Hope that helps, David
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