I believe Chris has already answered your question. The source code shows what
is displayed at various verbosity levels. IMO, the important information is the
list of OpenGL extensions, and a dump of the loaded shader code. These are
displayed with OSG_NOTIFY_LEVEL set to INFO.
OSG doesn't use a logging system (such as Poco) that allows you to set varying
verbosity levels per module; the verbosity level applies to all of OSG. During
development, I often write messages to DEBUG_FP, but I usually use a common tag
at the start of the message so I can pipe it to grep to filter out the cruft I
don't want to see.
-Paul
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